Straylight values 1 month after laser in situ keratomileusis and photorefractive keratectomy

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "Straylight values 1 month after laser in situ keratomileusis and photorefractive keratectomy"

Transcription

1 ARTICLE Straylight values 1 month after laser in situ keratomileusis and photorefractive keratectomy Jeroen J.G. Beerthuizen, MD, FEBOphth, Luuk Franssen, MSc, Monika Landesz, MD, PhD, Thomas J.T.P. van den Berg, PhD PURPOSE: To compare straylight values before and 1 month after laser in situ keratomileusis (LASIK) and photorefractive keratectomy (PRK). SETTING: Private practice refractive surgery center, Delft, The Netherlands. METHODS: In a prospective nonrandomized study, straylight values of 21 patients (42 eyes) were measured using the van den Berg straylight meter (third generation) during intake sessions at a refractive surgery clinic. Of the 21 patients, 12 were scheduled for LASIK (6 patients, 12 eyes) or PRK (6 patients, 12 eyes). At the 1-month follow-up visit, straylight values were measured again in the same manner and compared with the preoperative straylight values. RESULTS: Overall, there was no statistically significant increase in straylight values compared with the preoperative values 1 month after LASIK or PRK (P >.05). Individual straylight values increased in some cases, however, and the values correlated well with decreased quality of vision and changes in the eye examination. CONCLUSION: Straylight values 1 month after LASIK or PRK did not increase on average, although individual straylight values increased in some cases. J Cataract Refract Surg 2007; 33: Q 2007 ASCRS and ESCRS Patient satisfaction after laser refractive surgery is not always guaranteed when visual acuity is 20/20. In particular, visual imperfections that become apparent or get worse at night can compromise visual function despite excellent visual acuity. Therefore, the term quality of vision might be more appropriate to use as an outcome measure for refractive surgery. Quality of vision includes, among other parameters, the degree of night-vision disturbances, which occur Accepted for publication January 17, From the Department of Ophthalmology, VU University Medical Center (Beerthuizen), and the Netherlands Ophthalmic Research Institute (Franssen, van den Berg), Amsterdam, and Visionclinics (Landesz), Delft, The Netherlands. Dr. van den Berg is an employee of the Royal Netherlands Academy of Arts and Sciences, which has a financial interest in the C-Quant straylight meter. None of the other authors have a financial or proprietary interest in any material or method mentioned. Corresponding author: Jeroen J.G. Beerthuizen, MD, FEBOphth, Department of Ophthalmology, VU University Medical Center, De Boelelaan 1117, 1081 HV, Amsterdam, The Netherlands. Q 2007 ASCRS and ESCRS Published by Elsevier Inc. relatively frequently and with a highly variable incidence. 1 This variability in incidence might be explained by the many definitions of night-vision disturbances and the many modifiers involved. 2 A reproducible clinical test that can objectively measure something that is related to 1 or more symptoms of subjective quality of vision is therefore needed. 3 One such test is the van den Berg straylight meter. The straylight meter measures forward light scatter and provides direct information about optical imperfections as the cause of glare disability. 4 Glare disability, a factor in the quality of vision, refers to a reduction in visual performance caused by a glare source, resulting in retinal contrast loss secondary to intraocular straylight. This occurs, for instance, when a person cannot see a car in front of him or her at night when confronted with the headlights of oncoming traffic. We were interested in determining whether laser refractive surgery induces an increase in intraocular straylight. Studies have shown both an increase 5 and no increase 6 in straylight values 1 month after photorefractive keratectomy (PRK). Theoretically, corneal wound healing (PRK) and flap-related optical imperfections (laser in situ keratomileusis [LASIK]) could lead to increased straylight values /07/$dsee front matter 779 doi: /j.jcrs

2 780 STRAYLIGHT VALUES AFTER LASIK AND PRK PATIENTS AND METHODS Twenty-one patients (42 eyes) who entered a private clinic for refractive surgery preassessment were enrolled in a prospective study. A full ophthalmologic examination was performed including uncorrected visual acuity (UCVA), manifest refraction, best spectacle-corrected visual acuity (BSCVA), cycloplegic refraction, pupillometry (mesopic), dilated fundoscopy, intraocular pressure (IOP), topography, pachymetry, and biomicroscopy. Straylight measurements were taken 4 times per eye, twice with the eye dilated and twice with the eye undilated. Of the 21 patients, 6 (12 eyes) were scheduled for LASIK and 6 (12 eyes) were scheduled for alcohol-assisted PRK. Choice of treatment was based on standard refractive surgery inclusion criteria and patient preference. The remaining 9 patients were excluded for refractive surgery or scheduled for phakic intraocular lens implantation. Laser in situ keratomileusis surgery was performed using a Hansatome microkeratome (Bausch & Lomb) and a 50 Hz flying-spot laser (Technolas 217Z, Bausch & Lomb). In the alcohol-assisted PRK group, the epithelium was removed after 30-seconds exposure to a 20% ethanol solution. The same excimer laser with the same software was used. One month after laser surgery, both groups were evaluated at the same clinic. Postoperative evaluations included UCVA, BSCVA, manifest refraction, IOP, and biomicroscopy. Patients were asked whether they experienced night-vision disturbances such as glare. Straylight measurements were again taken 4 times per eye, twice with the eye dilated and twice with the eye undilated. Three months postoperatively, visual acuity and biomicroscopy were reevaluated in the PRK group. Straylight Measurements Intraocular straylight was measured using the thirdgeneration van den Berg straylight meter. 7 The first 2 generations of this instrument measured straylight using the direct compensation method based on a flickering annular source of straylight. 8,9 This flickering annulus causes a perceptible straylight flicker in the center of this annulus. Counter-phase flickering light is then presented in that center; the subject can adjust the intensity of the light to eventually cancel the amount of straylight. Because some subjects found these measurements too difficult and time consuming, a new psychophysical approach was defined. In the third-generation straylight meter, the central test field is divided into 2 fields, 1 with counter-phase compensation light and 1 without counter-phase compensation light. The subject must choose which half flickers more strongly (2 alternative forced-choice procedure). A fixed number of stimuli is presented, which yields a controlled test duration. The subject s responses are analyzed by a maximum likelihood procedure, from which the straylight value and a reliability estimate of this value are calculated. 10 The thirdgeneration straylight meter has been used in 2400 subjects, producing a standard deviation of repeated measurements of 0.06 log units (van den Berg TJ, et al. IOVS 2005; 46:ARVO E-Abstract 4315). A commercially available version of the third-generation straylight meter, the C-Quant (Oculus), was recently introduced and found to give comparable results. 7 Straylight measurements were assessed for quality. Poorquality measurements were filtered out, yielding reliable straylight values. In an earlier study, 10 the parameter of expected standard deviation was developed as a qualitycontrol parameter. In the present study, a limit value of expected standard deviation of less than 0.10 was adopted. To check the actual standard deviation in the present study, every first measurement was compared to the second one, producing a standard deviation of repeated measurements of log units, virtually the same as in the earlier studies 7 (van den Berg TJ, et al. IOVS 2005; 46:ARVO E-Abstract 4315). Power Analysis Using Altman s nomogram, it was calculated that 8 eyes were required to obtain a 95% chance (power Z 0.95; b Z 0.05) of detecting a clinically relevant difference in log(s) of 0.10 log units (D Z 0.10) at the 5% level of significance (a Z 0.05) using the paired t test. In this calculation, a conservative value for the standard deviation of repeated measurements of 0.05 log units was used based on the fact that most measurements were an average of 2 measurements, each with an average standard deviation of repeated measurements of (as mentioned above). Based on this, it was concluded that a single repeat of each measurement was sufficient. RESULTS Both Groups The mean difference between preoperative and postoperative straylight measurements in the LASIK group and PRK group combined was G (SEM) in the undilated eye group and G in the dilated eye group. There was no statistically significant increase in straylight values after treatment (PO.05). However, individual increased straylight occurred in some cases. Laser In Situ Keratomileusis Group The UCVA was 20/20 or better in 8 eyes and 20/25 in 4 eyes. The BSCVA was unchanged in 5 eyes; 4 eyes gained 1 line and 3 eyes lost 1 line from baseline (1 eye from 20/20 to 20/25 and 2 eyes from 20/15 to 20/20). The mean spherical equivalent (SE) was 3.27 diopters (D) (range 1.00 to 4.90 D) preoperatively and 0.05 D (range 0.38 to C0.25 D) 1 month postoperatively. Straylight values did not increase on average (PO.05) (Figure 1). In Figure 1, eyes that had a straylight increase of more than 0.20 log units (P!.0005) are numbered 1 to 3. Number 4 refers to the only eye with a straylight increase between 0.15 log units and 0.20 log units (P!.006). Two patients reported nightvision disturbances, 1 of them in 1 eye only. Both patients had microstriae in the corneal flaps with good UCVA (20/20 or better). One had increased straylight in the symptomatic eye (Figure 1, eye 2), while the asymptomatic eye showed no increase. The other patient did not have increased straylight in either eye. Two asymptomatic patients had increased

3 STRAYLIGHT VALUES AFTER LASIK AND PRK 781 1,5 LASIK 1,5 PRK 1,4 1,4 1,3 1,3 log(s) postop 1,2 1,1 1 log(s) postop 1,2 1,1 1 0,9 undilated 0,8 dilated x=y 0,7 0,7 0,8 0,9 1 1,1 1,2 1,3 1,4 1,5 log(s) preop Figure 1. Preoperative versus postoperative straylight values in the LASIK group. Numbers 1 to 3 represent eyes with an increase in straylight of more than 0.20 log units (P!.0005). Number 4 represents the eye with an increase in straylight between 0.15 log units and 0.20 log units (P!.006). Data from dilated and undilated eyes are plotted with different markers. 0,9 0,8 undilated dilated x=y 0,7 0,7 0,8 0,9 1 1,1 1,2 1,3 1,4 1,5 log(s) preop Figure 2. Preoperative versus postoperative straylight values in the PRK group. Number 1 represents the eye with an increase in straylight of more than 0.20 log units (P!.0005). Number 2 represents the eye with an increase in straylight between 0.15 log units and 0.20 log units (P!.006). Data from dilated and undilated eyes are plotted with different markers. straylight values in 1 eye. One eye had microstriae in the flap (Figure 1, eye 1), while the fellow eye had no abnormalities on examination and no increase in straylight. The other eye had a significant amount of debris under the flap (Figure 1, eyes 3 and 4). Photorefractive Keratectomy Group The UCVA was 20/20 or better in 6 eyes, 20/25 in 3 eyes, 20/30 in 1 eye, 20/40 in 1 eye, and 20/60 in 1 eye. The BSCVA was unchanged in 6 eyes; 2 eyes gained 1 line and 4 eyes lost 1 line from baseline (from 20/15 to 20/20). The mean SE was 3.09 D (range 1.50 to 6.63 D) preoperatively and 0.19 D (range 1.00 to C0.63 D) 1 month postoperatively. As in the LASIK group, there were no statistically significant changes in straylight values (PO.05) (Figure 2). In Figure 2, the number 1 refers to the only eye with a straylight increase of more than 0.20 log units (P!.0005); 2 refers to the only eye with a straylight increase between 0.15 log units and 0.20 log units (P!.006). Two patients reported night-vision disturbances, 1 of them in 1 eye only. This patient had grade 1 haze and increased straylight in that eye (Figure 2, eye 2). The fellow asymptomatic eye showed grade 0 to 1 haze and no increased straylight. The UCVA in the symptomatic eye was lower (20/25) than in the asymptomatic eye (20/15). The other patient did not have increased straylight values or abnormalities on eye examination. The UCVA, however, was lower than desired (20/60 and 20/40). Furthermore, 1 eye with a straylight increase (Figure 2, eye 1) had slight haze, although it did not cause night-vision disturbances. Overall, 7 eyes had mild to grade 1 haze, with 2 having a straylight increase of more than 0.15 log units 1 month postoperatively. By the 3-month postoperative examination, haze had disappeared in 4 eyes and was mild in 3 eyes. DISCUSSION In this prospective nonrandomized study, no statistically significant increase in intraocular straylight occurred 1 month after LASIK or alcohol-assisted PRK. Animal studies have shown that corneal backscattering of light, which correlates with visible haze, is significantly stronger after PRK than after LASIK 11,12 and peaks 1 month after PRK. 13 In humans, haze peaks at approximately 2 months. 14 In our study group, haze was more apparent at 1 month and disappeared or decreased by 3 months postoperatively. Backscattering of light, however, does not equal forward scattering

4 782 STRAYLIGHT VALUES AFTER LASIK AND PRK of light, or intraocular straylight, which is the physical basis of glare disability. 15 Studies of intraocular straylight 1 month after PRK show both an increase 5 and no increase. 6 The patients in the study with increased straylight had significantly more haze (grade 2 and higher) than those in the study without increased straylight and those in our study (maximum grade 1 in both studies). These differences might be due to the use of a 5.0 mm ablation zone and a higher preoperative refraction in the first study. No peerreviewed studies of straylight 1 month after LASIK could be found in the literature. Straylight measurements were taken with undilated pupils and with pharmacologically dilated pupils. Preoperative versus postoperative straylight values did not show a statistically significant increase in either group, so all data could be pooled and analyzed together. However, straylight values in eyes with dilated pupils were higher both preoperatively and postoperatively, as expected. 16 Although straylight values did not increase on average, individual straylight increased in some cases. Two patients with microstriae in the flap and good UCVA (20/20 or better) reported night-vision disturbances after LASIK; 1 had increased straylight (O0.20 log units) in the symptomatic eye. Furthermore, 1 eye with microstriae had increased straylight (O0.20 log units) without night-vision disturbances. This led us to believe that microstriae might play a negative role in quality of vision after LASIK, although the number of eyes is too small to confirm that theory. It has been shown, however, that subtle microstriae can reduce contrast sensitivity despite normal visual acuity. 17 A well-recognized problem with assessing quality of vision and night-vision disturbances is the lack of generally accepted objective tests. 3 In our study, patients were asked whether they developed problems with nighttime vision after laser treatment. We then compared the outcomes with individual straylight measurements and an ophthalmologic examination, including preoperative and postoperative refractions. Two patients reported an increase in night-vision disturbances in 1 eye only. These symptomatic eyes had higher straylight values than the asymptomatic fellow eyes. On ocular examination, 1 eye had microstriae while the asymptomatic fellow eye did not. The other eye had more haze than the asymptomatic fellow eye. Two other patients with increased night-vision disturbances, however, did not have an increase in straylight values. One had microstriae in both flaps, and the other had a lower than targeted UCVA. Furthermore, 3 eyes had increased straylight without night-vision disturbances. One of the eyes had mild haze after PRK, 1 had microstriae, and 1 had a significant amount of debris under the flap. Overall, one third of eyes with changes in the ocular examination had increased straylight values (O0.15 log units), indicating that a slitlamp examination alone is not a good predictor of changes in intraocular straylight and the presence of glare disability. On the other hand, all eyes with individual increased straylight (O0.15 log units) had changes in the ocular examination, in particular microstriae in the LASIK group and haze in the PRK group. These changes did not always correlate with subjective changes in quality of vision. One reason might be that patients compare their quality of vision after laser correction with quality of vision while wearing contact lenses. This not only gives information about changes in the cornea, it also includes the effect of the contact lenses. Unpublished observations from van den Berg s laboratory showed that a contact lens induced straylight increase often occurs. Furthermore, we did not use a more precise subjective instrument, such as a questionnaire with a rating system, to assess nightvision disturbances. However, we found the straylight meter to be a useful test as it gives direct information about optical imperfections as the cause of nightvision disturbances and increased straylight values (O0.15 log units) correlated well with ocular examinations. In summary, straylight values 1 month after LASIK and PRK did not increase on average. Individual increased straylight values, however, were recorded, and they correlated with ocular examination findings, but not always with subjective symptoms. A larger series of patients is needed to ascertain the importance of individual increased straylight values. Furthermore, it would be interesting to determine whether refractive corrections higher than those in our study increase overall straylight after laser treatment. A longer follow-up after treatment to assess whether straylight values change over time should be included in future research. REFERENCES 1. Bailey MD, Mitchell GL, Dhaliwal DK, et al. Patient satisfaction and visual symptoms after laser in situ keratomileusis. Ophthalmology 2003; 110: Pop M, Payette Y. Risk factors for night vision complaints after LASIK for myopia. Ophthalmology 2004; 111: Fan-Paul NI, Li J, Sullivan Miller J, Florakis GJ. Night vision disturbances after corneal refractive surgery. Surv Ophthalmol 2002; 47: van den Berg TJTP. On the relation between glare and straylight. Doc Ophthalmol 1991; 78: Veraart HGN, van den Berg TJTP, Hennekes R, Adank AMJ. Stray light in photorefractive keratectomy for myopia. Doc Ophthalmol 1995; 90: Harrison JM, Tennant TB, Gwin MC, et al. Forward light scatter at one month after photorefractive keratectomy. J Refract Surg 1995; 11:83 88

5 STRAYLIGHT VALUES AFTER LASIK AND PRK Franssen L, Coppens JE, van den Berg TJTP. Compensation comparison method for assessment of retinal straylight. Invest Ophthalmol Vis Sci 2006; 47: van den Berg TJTP. Importance of pathological intraocular light scatter for visual disability. Doc Ophthalmol 1986; 61: van den Berg TJTP. Analysis of intraocular straylight, especially in relation to age. Optom Vis Sci 1995; 72: Coppens JE, Franssen L, van Rijn LJ, van den Berg TJTP. Reliability of the compensation comparison stray-light measurement method. In press, J Biomed Opt Chang S-W, Benson A, Azar DT. Corneal light scattering with stromal reformation after laser in situ keratomileusis and photorefractive keratectomy. J Cataract Refract Surg 1998; 24: Jain S, Khoury JM, Chamon W, Azar DT. Corneal light scattering after laser in situ keratomileusis and photorefractive keratectomy. Am J Ophthalmol 1995; 120: Kaji Y, Obata H, Usui T, et al. Three-dimensional organization of collagen fibrils during corneal stromal wound healing after excimer laser keratectomy. J Cataract Refract Surg 1998; 24: Lohmann CP, Gartry DS, Kerr Muir M, et al. Corneal haze after excimer laser refractive surgery: objective measurements and functional implications. Eur J Ophthalmol 1991; 1: de Waard PWT, IJspeert JK, van den Berg TJTP, de Jong PTVM. Intraocular light scattering in age-related cataracts. Invest Ophthalmol Vis Sci 1992; 33: IJspeert JK, de Waard PWT, van den Berg TJTP, de Jong PTVM. The intraocular straylight function in 129 healthy volunteers; dependence on angle, age and pigmentation. Vision Res 1990; 30: Quesnel N-M, Lovasik JV, Ferremi C, et al. Laser in situ keratomileusis for myopia and the contrast sensitivity function. J Cataract Refract Surg 2004; 30:

Straylight literature overview for C-Quant. March 2006

Straylight literature overview for C-Quant. March 2006 Straylight literature overview for C-Quant. March 2006 INTRODUCTIONS This and other documents are prepared by TJTP van den Berg and coworkers for users of the C-Quant by Oculus GmbH. Dr van den Berg will

More information

Retreatment by Lifting the Original Laser in Situ Keratomileusis Flap after Eleven Years

Retreatment by Lifting the Original Laser in Situ Keratomileusis Flap after Eleven Years Retreatment by Lifting the Original Laser in Situ Keratomileusis Flap after Eleven Years Hassan Hashemi, MD 1,2 Mehrdad Mohammadpour, MD 3 Abstract Purpose: To describe a case of successful laser in situ

More information

The pinnacle of refractive performance.

The pinnacle of refractive performance. Introducing! The pinnacle of refractive performance. REFRACTIVE SURGERY sets a new standard in LASIK outcomes More than 98% of patients would choose it again. 1 It even outperformed glasses and contacts

More information

Advanced personalized nomogram for myopic laser surgery: First 100 eyes

Advanced personalized nomogram for myopic laser surgery: First 100 eyes ARTICLE Advanced personalized nomogram for myopic laser surgery: First 1 eyes Ruth Lapid-Gortzak, MD, Jan Willem van der Linden, BOpt, Ivanka J.E. van der Meulen, MD, Carla P. Nieuwendaal, MD PURPOSE:

More information

VISX Wavefront-Guided LASIK for Correction of Myopic Astigmatism, Hyperopic Astigmatism and Mixed Astigmatism (CustomVue LASIK Laser Treatment)

VISX Wavefront-Guided LASIK for Correction of Myopic Astigmatism, Hyperopic Astigmatism and Mixed Astigmatism (CustomVue LASIK Laser Treatment) CustomVue Advantage Patient Information Sheet VISX Wavefront-Guided LASIK for Correction of Myopic Astigmatism, Hyperopic Astigmatism and Mixed Astigmatism (CustomVue LASIK Laser Treatment) Statements

More information

LASIK in the Presbyopic Age Group

LASIK in the Presbyopic Age Group LASIK in the Presbyopic Age Group Safety, Efficacy, and Predictability in 40- to 69-Year-Old Patients Ramon C. Ghanem, MD, 1,2 Jose de la Cruz, MD, 1,2 Faisal M. Tobaigy, MD, 1 Leonard P. K. Ang, FRCS(Ed),

More information

Active Cyclotorsion Error Correction During LASIK for Myopia and Myopic Astigmatism With the NIDEK EC-5000 CX III Laser

Active Cyclotorsion Error Correction During LASIK for Myopia and Myopic Astigmatism With the NIDEK EC-5000 CX III Laser Active Cyclotorsion Error Correction During LASIK for Myopia and Myopic Astigmatism With the NIDEK EC-5000 CX III Laser Sudhank Bharti, MD; Harkaran S. Bains ABSTRACT PURPOSE: To investigate the predictability

More information

Wavefront technology has been used in our

Wavefront technology has been used in our Wavefront Customized Ablations With the WASCA Asclepion Workstation Sophia I. Panagopoulou, BSc; Ioannis G. Pallikaris, MD ABSTRACT PURPOSE: WASCA (Wavefront Aberration Supported Cornea Ablation) is a

More information

Comparison of higher-order aberrations after wavefront-guided laser in situ keratomileusis and laser-assisted subepithelial keratectomy

Comparison of higher-order aberrations after wavefront-guided laser in situ keratomileusis and laser-assisted subepithelial keratectomy J CATARACT REFRACT SURG - VOL 32, MAY 2006 Comparison of higher-order aberrations after wavefront-guided laser in situ keratomileusis and laser-assisted subepithelial keratectomy So-Hyang Chung, MD, In

More information

Wavefront-guided Custom Ablation for Myopia Using the NIDEK NAVEX Laser System

Wavefront-guided Custom Ablation for Myopia Using the NIDEK NAVEX Laser System Wavefront-guided Custom Ablation for Myopia Using the NIDEK NAVEX Laser System Jan Venter, MD ABSTRACT PURPOSE: To determine the predictability, effi cacy, safety, and stability of LASIK using custom ablation

More information

FIRST EXPERIENCE WITH THE ZEISS FEMTOSECOND SYSTEM IN CONJUNC- TION WITH THE MEL 80 IN THE US

FIRST EXPERIENCE WITH THE ZEISS FEMTOSECOND SYSTEM IN CONJUNC- TION WITH THE MEL 80 IN THE US FIRST EXPERIENCE WITH THE ZEISS FEMTOSECOND SYSTEM IN CONJUNC- TION WITH THE MEL 80 IN THE US JON DISHLER, MD DENVER, COLORADO, USA INTRODUCTION AND STUDY OBJECTIVES This article summarizes the first US

More information

LASIK SURGERY OUTCOMES, VOLUME AND RESOURCES

LASIK SURGERY OUTCOMES, VOLUME AND RESOURCES MOH Information Paper: 2006/17 LASIK SURGERY OUTCOMES, VOLUME AND RESOURCES By Dr. Ganga Ganesan 1 I INTRODUCTION LASIK stands for Laser-Assisted In Situ Keratomileusis and is a surgical procedure that

More information

Corneal intrastromal implantation surgery for the treatment of moderate and high myopia

Corneal intrastromal implantation surgery for the treatment of moderate and high myopia TECHNIQUE Corneal intrastromal implantation surgery for the treatment of moderate and high myopia Albert Daxer, MD, PhD I describe a corneal intrastromal implantation technique that uses a new type of

More information

Introducing TOPOGRAPHY-GUIDED REFRACTIVE SURGERY

Introducing TOPOGRAPHY-GUIDED REFRACTIVE SURGERY Sponsored by Introducing TOPOGRAPHY-GUIDED REFRACTIVE SURGERY Results of the T-CAT Phase III Clinical Trial TOPOGRAPHY-GUIDED REFRACTIVE SURGERY Topography-Guided Custom Ablation Treatments (T-CAT) with

More information

TABLE OF CONTENTS: LASER EYE SURGERY CONSENT FORM

TABLE OF CONTENTS: LASER EYE SURGERY CONSENT FORM 1 BoydVision TABLE OF CONTENTS: LASER EYE SURGERY CONSENT FORM Risks and Side Effects... 2 Risks Specific to PRK... 3 Risks Specific to LASIK... 4 Patient Statement of Consent... 5 Consent for Laser Eye

More information

VA high quality, complications low with phakic IOL

VA high quality, complications low with phakic IOL Page 1 of 5 VA high quality, complications low with phakic IOL Use in keratoconus will continue, one surgeon predicts; another ponders long-term safety Nov 1, 2007 By:Nancy Groves Ophthalmology Times Several

More information

Laser in situ keratomileusis in patients with corneal guttata and family history of Fuchs endothelial dystrophy

Laser in situ keratomileusis in patients with corneal guttata and family history of Fuchs endothelial dystrophy J CATARACT REFRACT SURG - VOL 31, DECEMBER 2005 Laser in situ keratomileusis in patients with corneal guttata and family history of Fuchs endothelial dystrophy Majid Moshirfar, MD, Vahid Feiz, MD, Michael

More information

Comparison Between the Visian ICL, LASIK, and PRK

Comparison Between the Visian ICL, LASIK, and PRK Deciding on the vision correction procedure that s right for you is an important one. The table below provides a general comparison of the major differences between Visian ICL, LASIK and PRK. It is NOT

More information

LASIK SURGERY IN AL- NASSIRYA CITY A CLINICOSTATISTICAL STUDY

LASIK SURGERY IN AL- NASSIRYA CITY A CLINICOSTATISTICAL STUDY Thi-Qar Medical Journal (TQMJ): Vol(4) No(4):1(14-21) SUMMARY: LASIK SURGERY IN AL- NASSIRYA CITY A CLINICOSTATISTICAL STUDY Dr. Ali Jawad AL- Gidis (M.B.Ch.B., D.O., F.I.C.O.)* Background: LASIK which

More information

REFRACTIVE ERROR AND SURGERIES IN THE UNITED STATES

REFRACTIVE ERROR AND SURGERIES IN THE UNITED STATES Introduction REFRACTIVE ERROR AND SURGERIES IN THE UNITED STATES 150 million wear eyeglasses or contact lenses 2.3 million refractive surgeries performed between 1995 and 2001 Introduction REFRACTIVE SURGERY:

More information

Comparison of Retinal Image Quality between SBK and PRK. Allen Boghossian, D.O. Durrie Vision Overland Park, KS

Comparison of Retinal Image Quality between SBK and PRK. Allen Boghossian, D.O. Durrie Vision Overland Park, KS Comparison of Retinal Image Quality between and Allen Boghossian, D.O. Durrie Vision Overland Park, KS Study Design Purpose: To compare optical quality and intraocular scatter between and using double-pass

More information

Overview of Refractive Surgery

Overview of Refractive Surgery Overview of Refractive Surgery Michael N. Wiggins, MD Assistant Professor, College of Health Related Professions and College of Medicine, Department of Ophthalmology Jones Eye Institute University of Arkansas

More information

LASIK. Complications. Customized Ablations. Photorefractive Keratectomy. Femtosecond Keratome for LASIK. Cornea Resculpted

LASIK. Complications. Customized Ablations. Photorefractive Keratectomy. Femtosecond Keratome for LASIK. Cornea Resculpted Refractive Surgery: Which Procedure for Which Patient? David R. Hardten, M.D. Minneapolis, Minnesota Have done research, consulting, or speaking for: Alcon, Allergan, AMO, Bausch & Lomb, Inspire, Medtronic,

More information

Keratorefractive Surgery for Post-Cataract Refractive Surprise. Moataz El Sawy

Keratorefractive Surgery for Post-Cataract Refractive Surprise. Moataz El Sawy Keratorefractive Surgery for Post-Cataract Refractive Surprise Moataz El Sawy Departmentof Ophthalmology, Faculty of Medicine,MenoufiyaUniversity, Egypt mfelsawy@yahoo.co.uk Abstract: Purpose: To evaluate

More information

Comparison of Two Procedures: Photorefractive Keratectomy Versus Laser In Situ Keratomileusis for Low to Moderate Myopia

Comparison of Two Procedures: Photorefractive Keratectomy Versus Laser In Situ Keratomileusis for Low to Moderate Myopia Comparison of Two Procedures: Photorefractive Keratectomy Versus Laser In Situ Keratomileusis for Low to Moderate Myopia Jae Bum Lee, Jae Sung Kim, Chul-Myong Choe, Gong Je Seong and Eung Kweon Kim Institute

More information

Wavefront-guided Excimer Laser Vision Correction After Multifocal IOL Implantation

Wavefront-guided Excimer Laser Vision Correction After Multifocal IOL Implantation Wavefront-guided Excimer Laser Vision Correction After Multifocal IOL Implantation Bettina B. Jendritza, MD; Michael C. Knorz, MD; Steve Morton ABSTRACT PURPOSE: To investigate the use of wavefront-guided

More information

Customized corneal ablation and super vision. Customized Corneal Ablation and Super Vision

Customized corneal ablation and super vision. Customized Corneal Ablation and Super Vision Customized Corneal Ablation and Super Vision Scott M. MacRae, MD; James Schwiegerling, PhD; Robert Snyder, MD, PhD ABSTRACT PURPOSE: To review the early development of new technologies that are becoming

More information

Management of Unpredictable Post-PRK Corneal Ectasia with Intacs Implantation

Management of Unpredictable Post-PRK Corneal Ectasia with Intacs Implantation Management of Unpredictable Post-PRK Corneal Ectasia with Intacs Implantation Mohammad Naser Hashemian, MD 1 Mahdi AliZadeh, MD 2 Hassan Hashemi, MD 1,3 Firoozeh Rahimi, MD 4 Abstract Purpose: To present

More information

OriginalArticle. Quality of Life Assessment Before and After Laser in situ Keratomileusis

OriginalArticle. Quality of Life Assessment Before and After Laser in situ Keratomileusis OriginalArticle Quality of Life Assessment Before and After Laser in situ Keratomileusis Panida Kosrirukvongs, M.D.*, Watcharee Lermankul, B Pharm, Ph.D.**, Wipawee Booranapong, M.D.*, Sabong Srivannaboon,

More information

LASIK: Clinical Results and Their Relationship to Patient Satisfaction

LASIK: Clinical Results and Their Relationship to Patient Satisfaction LASIK: Clinical Results and Their Relationship to Patient Satisfaction Lien Thieu Tat A thesis submitted in fulfilment of the requirements for the degree of Doctor of Philosophy School of Applied Vision

More information

Life Science Journal 2014;11(9) http://www.lifesciencesite.com. Cross cylinder Challenging cases and their resultswith Nidek Quest (EC-5000)

Life Science Journal 2014;11(9) http://www.lifesciencesite.com. Cross cylinder Challenging cases and their resultswith Nidek Quest (EC-5000) Cross cylinder Challenging cases and their resultswith Nidek Quest (EC-5000) Gamal Mostafa Abo El Maaty, Mohamed Elmoddather, Mahmoud Ibrahem Ghazy, Mohamed Al-Taher Ophthalmology Department, Faculty of

More information

Retinal straylight and light distortion phenomena in normal and post-lasik eyes

Retinal straylight and light distortion phenomena in normal and post-lasik eyes DOI 10.1007/s00417-010-1583-7 REFRACTIVE SURGERY Retinal straylight and light distortion phenomena in normal and post-lasik eyes Alejandro Cerviño & Cesar Villa-Collar & Jose Manuel Gonzalez-Meijome &

More information

Long-term stability of the posterior cornea after laser in situ keratomileusis

Long-term stability of the posterior cornea after laser in situ keratomileusis ARTICLE Long-term stability of the posterior cornea after laser in situ keratomileusis Joseph B. Ciolino, MD, Stephen S. Khachikian, MD, Michael J. Cortese, OD, Michael W. Belin, MD PURPOSE: To study long-term

More information

CustomVue Treatments for Monovision in Presbyopic Patients with Low to Moderate Myopia and Myopic Astigmatism

CustomVue Treatments for Monovision in Presbyopic Patients with Low to Moderate Myopia and Myopic Astigmatism CustomVue Treatments for Monovision in Presbyopic Patients with Low to Moderate and Myopic Introduction Pre-Operative Examination Surgical Technique 1 2 IMPORTANT INFORMATION CustomVue Monovision treatments

More information

Comparison Combined LASIK Procedure for Ametropic Presbyopes and Planned Dual Interface for Post-LASIK Presbyopes Using Small Aperture Corneal Inlay

Comparison Combined LASIK Procedure for Ametropic Presbyopes and Planned Dual Interface for Post-LASIK Presbyopes Using Small Aperture Corneal Inlay Comparison Combined LASIK Procedure for Ametropic Presbyopes and Planned Dual Interface for Post-LASIK Presbyopes Using Small Aperture Corneal Inlay Minoru Tomita, MD, PhD 1,2 1) Shinagawa LASIK, Tokyo,

More information

Ectasia after laser in-situ keratomileusis (LASIK)

Ectasia after laser in-situ keratomileusis (LASIK) Ectasia after laser in-situ keratomileusis (LASIK) 長 庚 紀 念 醫 院 眼 科 蕭 靜 熹 Post-LASIK ectasia A rare complication of LASIK Manhattan jury awarded a former investment banker a record $7.25 million for post-lasik

More information

Comparison of Epi-LASIK and Off-Flap Epi-LASIK for the Treatment of Low and Moderate Myopia

Comparison of Epi-LASIK and Off-Flap Epi-LASIK for the Treatment of Low and Moderate Myopia Comparison of Epi-LASIK and Off-Flap Epi-LASIK for the Treatment of Low and Moderate Myopia Maria I. Kalyvianaki, MD, PhD, 1,2 George D. Kymionis, MD, PhD, 1,2 George A. Kounis, PhD, 1 Sophia I. Panagopoulou,

More information

Comparison of Higher Order Aberrations and Contrast Sensitivity After LASIK, Verisyse Phakic IOL, and Array Multifocal IOL

Comparison of Higher Order Aberrations and Contrast Sensitivity After LASIK, Verisyse Phakic IOL, and Array Multifocal IOL ORIGINAL ARTICLES Comparison of Higher Order Aberrations and Contrast Sensitivity After LASIK, Verisyse Phakic IOL, and Array Multifocal IOL Sasivimon Chandhrasri, MD; Michael C. Knorz, MD ABSTRACT PURPOSE:

More information

refractive surgery a closer look

refractive surgery a closer look 2011-2012 refractive surgery a closer look How the eye works Light rays enter the eye through the clear cornea, pupil and lens. These light rays are focused directly onto the retina, the light-sensitive

More information

Wavefront-guided Enhancements Using the WaveLight Excimer Laser in Symptomatic Eyes Previously Treated With LASIK

Wavefront-guided Enhancements Using the WaveLight Excimer Laser in Symptomatic Eyes Previously Treated With LASIK Wavefront-guided Enhancements Using the WaveLight Excimer Laser in Symptomatic Eyes Previously Treated With LASIK A. John Kanellopoulos, MD; Lawrence H. Pe, MD ABSTRACT PURPOSE: To describe our clinical

More information

What Laser Vision Correction Means to the Military

What Laser Vision Correction Means to the Military What Laser Vision Correction Means to the Military Soldiers, Sailors,, Airmen, Marines David J. Tanzer, MD Commander, Medical Corps, US Navy Director, US Navy Refractive Surgery Program Standard Disclaimer

More information

Treatment of Myopia and Myopic Astigmatism by Customized Laser In Situ Keratomileusis Based on Corneal Topography

Treatment of Myopia and Myopic Astigmatism by Customized Laser In Situ Keratomileusis Based on Corneal Topography Treatment of Myopia and Myopic Astigmatism by Customized Laser In Situ Keratomileusis Based on Corneal Topography Michael C. Knorz, MD, 1 Thomas Neuhann, MD 2 Objective: To evaluate the predictability,

More information

Rosario G. Anera, PhD, Jose R. Jiménez, PhD, Luis Jiménez del Barco, PhD, Javier Bermúdez, PhD, Enrique Hita, PhD

Rosario G. Anera, PhD, Jose R. Jiménez, PhD, Luis Jiménez del Barco, PhD, Javier Bermúdez, PhD, Enrique Hita, PhD Changes in corneal asphericity after laser in situ keratomileusis Rosario G. Anera, PhD, Jose R. Jiménez, PhD, Luis Jiménez del Barco, PhD, Javier Bermúdez, PhD, Enrique Hita, PhD Purpose: To analyze the

More information

Daniel F. Goodman, M.D. 2211 Bush Street, 2nd Floor San Francisco, CA 94115 Phone: 415-474-3333 Fax: 415-474-3939

Daniel F. Goodman, M.D. 2211 Bush Street, 2nd Floor San Francisco, CA 94115 Phone: 415-474-3333 Fax: 415-474-3939 Daniel F. Goodman, M.D. 2211 Bush Street, 2nd Floor San Francisco, CA 94115 Phone: 415-474-3333 Fax: 415-474-3939 INFORMED CONSENT FOR LASIK (LASER IN SITU KERATOMILEUSIS) and PRK (PHOTOREFRACTIVE KERATECTOMY)

More information

Comparison of the corneal response to laser in situ keratomileusis with flap creation using the FS15 and FS30 femtosecond lasers

Comparison of the corneal response to laser in situ keratomileusis with flap creation using the FS15 and FS30 femtosecond lasers ARTICLE Comparison of the corneal response to laser in situ keratomileusis with flap creation using the FS15 and FS30 femtosecond lasers Clinical and confocal microscopy findings Michael Y. Hu, James P.

More information

What is Refractive Error?

What is Refractive Error? Currently, about 55% of the civilian pilots in the United States must utilize some form of refractive correction to meet the vision requirements for medical certification. While spectacles are the most

More information

Pseudo-accommodative Cornea (PAC) for the Correction of Presbyopia

Pseudo-accommodative Cornea (PAC) for the Correction of Presbyopia Pseudo-accommodative Cornea (PAC) for the Correction of Presbyopia Alaa El Danasoury, FRCS Magrabi Hospitals & Centers Surgical options for the Correction of Presbyopia Monovision Reversal of Presbyopia:

More information

Case Reports Post-LASIK ectasia treated with intrastromal corneal ring segments and corneal crosslinking

Case Reports Post-LASIK ectasia treated with intrastromal corneal ring segments and corneal crosslinking Case Reports Post-LASIK ectasia treated with intrastromal corneal ring segments and corneal crosslinking Kay Lam, MD, Dan B. Rootman, MSc, Alejandro Lichtinger, and David S. Rootman, MD, FRCSC Author affiliations:

More information

Patient-Reported Outcomes with LASIK (PROWL-1) Results

Patient-Reported Outcomes with LASIK (PROWL-1) Results Patient-Reported Outcomes with LASIK (PROWL-1) Results Elizabeth M. Hofmeister, MD CAPT, MC, USN Naval Medical Center San Diego Refractive Surgery Advisor for Navy Ophthalmology Assistant Professor of

More information

Conductive keratoplasty (CK) utilizes radiofrequency energy. Original Article

Conductive keratoplasty (CK) utilizes radiofrequency energy. Original Article Original Article Comparing the Rate of Regression after Conductive Keratoplasty with or without Prior Laser-Assisted in situ Keratomileusis or Photorefractive Keratectomy Majid Moshirfar, Erik Anderson

More information

Laser refractive surgery is becoming increasingly

Laser refractive surgery is becoming increasingly Correlation of Aberrations With Visual Symptoms Using Wavefront Analysis in Eyes After Laser in situ Keratomileusis Maria Regina Chalita, MD; Meng Xu, MS; Ronald R. Krueger, MD, MSE ABSTRACT PURPOSE: To

More information

Corneal ectasia induced by laser in situ keratomileusis. Ioannis G. Pallikaris, MD, PhD, George D. Kymionis, MD, PhD, Nikolaos I.

Corneal ectasia induced by laser in situ keratomileusis. Ioannis G. Pallikaris, MD, PhD, George D. Kymionis, MD, PhD, Nikolaos I. Corneal ectasia induced by laser in situ keratomileusis Ioannis G. Pallikaris, D, PhD, George D. Kymionis, D, PhD, Nikolaos I. Astyrakakis, OD ABSTRACT Purpose: To identify factors that can lead to corneal

More information

Changes in higher order aberrations after wavefront-guided PRK for correction of low to moderate myopia and myopic astigmatism: Two-year follow-up

Changes in higher order aberrations after wavefront-guided PRK for correction of low to moderate myopia and myopic astigmatism: Two-year follow-up European Journal of Ophthalmology / Vol. 17 no. 4, 2007 / pp. 507-514 Changes in higher order aberrations after wavefront-guided PRK for correction of low to moderate myopia and myopic astigmatism: Two-year

More information

The development of videokeratoscopes capable

The development of videokeratoscopes capable Aberrations and Visual Performance Following Standard Laser Vision Correction Susana Marcos, PhD ABSTRACT PURPOSE: To relate the change of ocular aberrations with the change of visual performance produced

More information

Tamer O. Gamaly, FRCS; Alaa El Danasoury, MD, FRCS; Akef El Maghraby, MD

Tamer O. Gamaly, FRCS; Alaa El Danasoury, MD, FRCS; Akef El Maghraby, MD A Prospective, Randomized, Contralateral Eye Comparison of Epithelial Laser in situ Keratomileusis and Photorefractive Keratectomy in Eyes Prone to Haze Tamer O. Gamaly, FRCS; Alaa El Danasoury, MD, FRCS;

More information

Informed Consent for Refractive Lens Exchange (Clear Lens Replacement)

Informed Consent for Refractive Lens Exchange (Clear Lens Replacement) Mark Packer, M.D. Informed Consent for Refractive Lens Exchange (Clear Lens Replacement) This surgery involves the removal of the natural lens of my eye, even though it is not a cataract. The natural lens

More information

Comparison of Residual Stromal Bed Thickness and Flap Thickness at LASIK and Post-LASIK Enhancement in Femtosecond Laser-Created Flaps

Comparison of Residual Stromal Bed Thickness and Flap Thickness at LASIK and Post-LASIK Enhancement in Femtosecond Laser-Created Flaps Comparison of Residual Stromal Bed Thickness and Flap Thickness at LASIK and Post-LASIK Enhancement in Femtosecond Laser-Created Flaps Lingo Y. Lai, MD William G. Zeh, MD Clark L. Springs, MD The authors

More information

INFORMED CONSENT FOR PHOTOREFRACTIVE KERATECTOMY (PRK)

INFORMED CONSENT FOR PHOTOREFRACTIVE KERATECTOMY (PRK) INFORMED CONSENT FOR PHOTOREFRACTIVE KERATECTOMY (PRK) This information and the Patient Information booklet must be reviewed so you can make an informed decision regarding Photorefractive Keratectomy (PRK)

More information

Informed Consent for Refractive Lens Exchange (Clear Lens Extraction)

Informed Consent for Refractive Lens Exchange (Clear Lens Extraction) Informed Consent for Refractive Lens Exchange (Clear Lens Extraction) This form is designed to ensure that you have all the information you need to make a decision about whether or not you wish to undergo

More information

Accelerated Refractive Performance

Accelerated Refractive Performance Accelerated Refractive Performance Get There at the Speed of WaveLight Designed to accommodate your refractive technology goals now and into the future, the WaveLight Workstation is a faster way to get

More information

Case Report Laser Vision Correction on Patients with Sick Optic Nerve: A Case Report

Case Report Laser Vision Correction on Patients with Sick Optic Nerve: A Case Report Case Reports in Ophthalmological Medicine Volume 2011, Article ID 796463, 4 pages doi:10.1155/2011/796463 Case Report Laser Vision Correction on Patients with Sick Optic Nerve: A Case Report Ming Chen

More information

Long-Term Outcomes of Flap Amputation After LASIK

Long-Term Outcomes of Flap Amputation After LASIK Long-Term Outcomes of Flap Amputation After LASIK Priyanka Chhadva BS, Florence Cabot MD, Anat Galor MD, Sonia H. Yoo MD Bascom Palmer Eye Institute, University of Miami Miller School of Medicine Miami

More information

Correction of High Astigmatism: Case Studies Using the Mixed-cylinder Approach

Correction of High Astigmatism: Case Studies Using the Mixed-cylinder Approach Correction of High Astigmatism: Case Studies Using the Mixed-cylinder Approach Hamza N. Khan, MD, MPH, FRCSC; Geoffrey B. Kaye, MBChB, FCS(SA), FRCSC; Jean Luc Febbraro, MD ABSTRACT PURPOSE: To explain

More information

Refractive Surgery. Evolution of Refractive Error Correction

Refractive Surgery. Evolution of Refractive Error Correction Refractive Surgery Techniques that correct for refractive error in the eye have undergone dramatic evolution. The cornea is the easiest place to place a correction, so most techniques have focused on modifying

More information

Laser in situ keratomileusis (LASIK) has been. Retreatment of Hyperopia After Primary Hyperopic LASIK REPORTS

Laser in situ keratomileusis (LASIK) has been. Retreatment of Hyperopia After Primary Hyperopic LASIK REPORTS REPORTS Retreatment of Hyperopia After Primary Hyperopic LASIK Julio Ortega-Usobiaga, MD, PhD; Rosario Cobo-Soriano, MD, PhD; Fernando Llovet, MD; Francisco Ramos, MD; Jaime Beltrán, MD; Julio Baviera-Sabater,

More information

Topographically-guided Laser In Situ Keratomileusis to Treat Corneal Irregularities

Topographically-guided Laser In Situ Keratomileusis to Treat Corneal Irregularities Topographically-guided Laser In Situ Keratomileusis to Treat Corneal Irregularities Michael C. Knorz, MD, Bettina Jendritza, MD Objective: To evaluate the predictability and safety of topographically guided

More information

Anterior Elevation Maps as the Screening Test for the Ablation Power of Previous Myopic Refractive Surgery

Anterior Elevation Maps as the Screening Test for the Ablation Power of Previous Myopic Refractive Surgery Anterior Elevation Maps as the Screening Test for the Ablation Power of Previous Myopic Refractive Surgery Soo Yong Jeong, MD, Hee-Seung Chin, MD, PhD, Jung Hyub Oh, MD, PhD Department of Ophthalmology,

More information

Wavefront-guided versus standard laser in situ keratomileusis in low to moderate myopia

Wavefront-guided versus standard laser in situ keratomileusis in low to moderate myopia VOL. 29 NO. 1 PHILIPPINE JOURNAL OF Ophthalmology MARCH ORIGINAL ARTICLE 2004 Jose Ernesto G. Roces, MD Irwin Y. Cua, MD Mellanie M. Oro, OD Jerome M. Sarmiento, MD Winston L. Villar, MD Ruben Lim Bon

More information

EUROPEAN JOURNAL OF PHARMACEUTICAL AND MEDICAL RESEARCH www.ejpmr.com

EUROPEAN JOURNAL OF PHARMACEUTICAL AND MEDICAL RESEARCH www.ejpmr.com ejpmr, 2015,2(3), 436-440 EUROPEAN JOURNAL OF PHARMACEUTICAL AND MEDICAL RESEARCH www.ejpmr.com Tumram et al. SJIF Impact Factor 2.026 Research Article ISSN 3294-3211 EJPMR CLINICAL OUTCOME OF TORIC IOL

More information

Referrals to the Wills Eye Institute Cornea Service after laser in situ keratomileusis: Reasons for patient dissatisfaction

Referrals to the Wills Eye Institute Cornea Service after laser in situ keratomileusis: Reasons for patient dissatisfaction ARTICLE Referrals to the Wills Eye Institute Cornea Service after laser in situ keratomileusis: Reasons for patient dissatisfaction Brett A. Levinson, MD, Christopher J. Rapuano, MD, Elisabeth J. Cohen,

More information

Common visual problems in older LASIK patients

Common visual problems in older LASIK patients 丘 子 宏 LASIK 手 術 後 的 視 覺 Visual acuity:the measurement of high contrast Snellen acuity but not other functions under different condition Quality of vision: measure the visual functions in variable condition

More information

Our Commitment To You

Our Commitment To You SYSTEM SUPPORT Quality-crafted, the system boasts dependability with high efficiency and low gas usage. We provide responsive service and maintenance contract options, supported by our nationwide direct

More information

KERATOCONUS IS A BILATERAL, ASYMMETRIC, CHRONIC,

KERATOCONUS IS A BILATERAL, ASYMMETRIC, CHRONIC, Comparison of and Intacs for Keratoconus and Post-LASIK Ectasia MUNISH SHARMA, MD, AND BRIAN S. BOXER WACHLER, MD PURPOSE: To evaluate the efficacy of single-segment Intacs and compare with double-segment

More information

LASIK and PRK in refractive accommodative esotropia: a retrospective study on 20 adolescent and adult patients

LASIK and PRK in refractive accommodative esotropia: a retrospective study on 20 adolescent and adult patients European Journal of Ophthalmology / Vol. 19 no. 2, 2009 / pp. 188-195 LASIK and PRK in refractive accommodative esotropia: a retrospective study on 20 adolescent and adult patients ADRIANO MAGLI 1, ANTONELLO

More information

Dr. Booth received his medical degree from the University of California: San Diego and his bachelor of science from Stanford University.

Dr. Booth received his medical degree from the University of California: San Diego and his bachelor of science from Stanford University. We've developed this handbook to help our patients become better informed about the entire process of laser vision correction. We hope you find it helpful and informative. Dr. Booth received his medical

More information

One-year results of photorefractive keratectomy and laser in situ keratomileusis for myopia using a 213 nm wavelength solid-state laser

One-year results of photorefractive keratectomy and laser in situ keratomileusis for myopia using a 213 nm wavelength solid-state laser ARTICLE One-year results of photorefractive keratectomy and laser in situ keratomileusis for myopia using a 213 nm wavelength solid-state laser Nikolaos S. Tsiklis, MD, MSc, George D. Kymionis, MD, PhD,

More information

LASER VISION CORRECTION

LASER VISION CORRECTION LASER VISION CORRECTION Laser correction of certain visual problems is the most technologically advanced method available today for reducing your dependence on glasses and contact lenses. The outpatient

More information

LASIK for Hyperopia With the WaveLight Excimer Laser

LASIK for Hyperopia With the WaveLight Excimer Laser LASIK for Hyperopia With the WaveLight Excimer Laser A. John Kanellopoulos, MD; Joseph Conway, MD; Lawrence H. Pe, MD ABSTRACT PURPOSE: To evaluate the safety and effi cacy of the ALLEGRETTO WAVE excimer

More information

Surgical Advances in Keratoconus. Keratoconus. Innovations in Ophthalmology. New Surgical Advances. Diagnosis of Keratoconus. Scheimpflug imaging

Surgical Advances in Keratoconus. Keratoconus. Innovations in Ophthalmology. New Surgical Advances. Diagnosis of Keratoconus. Scheimpflug imaging Surgical Advances in Keratoconus Keratoconus Ectatic disorder 1 in 1,000 individuals Starts in adolescence & early adulthood Uncertain cause 20% require corneal transplant Innovations in Ophthalmology

More information

Wavefront Analysis in Post-LASIK Eyes and Its Correlation with Visual Symptoms, Refraction, and Topography

Wavefront Analysis in Post-LASIK Eyes and Its Correlation with Visual Symptoms, Refraction, and Topography Analysis in Post-LASIK Eyes and Its Correlation with Visual Symptoms, Refraction, and Topography Maria Regina Chalita, MD, 1 Sai Chavala, MD, 1 Meng Xu, MS, 2 Ronald R. Krueger, MD, MSE 1 Purpose: To evaluate

More information

Laser Vision Correction: A Tutorial for Medical Students

Laser Vision Correction: A Tutorial for Medical Students Laser Vision Correction: A Tutorial for Medical Students Written by: Reid Turner, M4 Reviewed by: Anna Kitzmann, MD Illustrations by: Steve McGaughey, M4 November 29, 2011 1. Introduction Laser vision

More information

Efficacy, precision, accuracy, and safety of the SMILE procedure

Efficacy, precision, accuracy, and safety of the SMILE procedure Efficacy, precision, accuracy, and safety of the SMILE procedure Jesper Hjortdal Clinical professor Head of Corneal & Refractive Surgery Department of Ophthalmology Aarhus University Hospital Denmark Small

More information

Uniquely Safe. predictably better for our patients. enhancement, may be significantly reduced.

Uniquely Safe. predictably better for our patients. enhancement, may be significantly reduced. Uniquely Safe Clinical Support: Six different studies verify the improved safety of flap creation with the INTRALASE FS laser when compared to traditional microkeratomes. Clinical studies validate the

More information

Patient outcomes of refractive surgery

Patient outcomes of refractive surgery articles Patient outcomes of refractive surgery The Refractive Status and Vision Profile Oliver D. Schein, MD, MPH, Susan Vitale, PhD, MHS, Sandra D. Cassard, ScD, Earl P. Steinberg, MD, MPP ABSTRACT Purpose:

More information

Techniques for Enhancing Cataract Surgery Patients with Residual Refractive Error. Director of Cornea Center For Excellence In Eye Care Miami, FL

Techniques for Enhancing Cataract Surgery Patients with Residual Refractive Error. Director of Cornea Center For Excellence In Eye Care Miami, FL Techniques for Enhancing Cataract Surgery Patients with Residual Refractive Error William Trattler, MD Director of Cornea Center For Excellence In Eye Care Miami, FL 1 Financial Disclosures Consulting

More information

Flight School Applicants Refractive Surgery Fact Sheet

Flight School Applicants Refractive Surgery Fact Sheet Flight School Applicants Refractive Surgery Fact Sheet What: LASIK (Laser in-situ keratomileusis) and PRK(Photorefractive keratectomy) are disqualifying for Army Aviation in accordance with Army Regulation

More information

Original Articles. Laser in situ Keratomileusis to Correct Residual Myopia After Cataract Surgery

Original Articles. Laser in situ Keratomileusis to Correct Residual Myopia After Cataract Surgery Original Articles Laser in situ Keratomileusis to Correct Residual Myopia After Cataract Surgery Maria J. Ayala, MD, PhD; Juan J. Pérez-Santonja, MD; Alberto Artola, MD, PhD; Pascual Claramonte, MD; Jorge

More information

LASIK To Improve Visual Acuity in Adult Neglected Refractive Amblyopic Eyes: Is It Worth?

LASIK To Improve Visual Acuity in Adult Neglected Refractive Amblyopic Eyes: Is It Worth? JKAU: Med. Sci., Vol. 18 No. 4, pp: 29-36 (2011 A.D. / 1432 A.H.) DOI: 10.4197/Med. 18-4.3 LASIK To Improve Visual Acuity in Adult Neglected Refractive Amblyopic Eyes: Is It Worth? Ali M. El-Ghatit, MD,

More information

Diego Fernando Suárez Sierra, MD Fellow Cornea and Refractive Surgery Fellow Lens and Ocular Surface Vejarano Laser Vision Center

Diego Fernando Suárez Sierra, MD Fellow Cornea and Refractive Surgery Fellow Lens and Ocular Surface Vejarano Laser Vision Center Corneal crosslinking with riboflavin and ultraviolet light before or after subepithelial keratectomy laser-assisted (LASEK) in patients with thin corneas. Diego Fernando Suárez Sierra, MD Fellow Cornea

More information

U.S. Food and Drug Administration Clinical Trial of the Implantable Contact Lens for Moderate to High Myopia

U.S. Food and Drug Administration Clinical Trial of the Implantable Contact Lens for Moderate to High Myopia U.S. Food and Drug Administration Clinical Trial of the Implantable Contact Lens for Moderate to High The Implantable Contact Lens in Treatment of (ITM) Study Group * Purpose: To assess the safety and

More information

Epi-LASIK: Preliminary clinical results of an alternative surface ablation procedure

Epi-LASIK: Preliminary clinical results of an alternative surface ablation procedure articles Epi-LASIK: Preliminary clinical results of an alternative surface ablation procedure Ioannis G. Pallikaris, MD, PhD, Maria I. Kalyvianaki, MD, Vikentia J. Katsanevaki, MD, PhD, Harilaos S. Ginis,

More information

Customized ablation algorithm for the treatment of steep central islands after refractive laser surgery

Customized ablation algorithm for the treatment of steep central islands after refractive laser surgery J CATARACT REFRACT SURG - VOL 32, MAY 2006 Customized ablation algorithm for the treatment of steep central islands after refractive laser surgery Farhad Hafezi, MD, Mirko Jankov, MD, Michael Mrochen,

More information

INSTITUT UNIVERSITARI BARRAQUER

INSTITUT UNIVERSITARI BARRAQUER INSTITUT UNIVERSITARI BARRAQUER UNIVERSITAT AUTÒNOMA DE BARCELONA DEPARTAMENT DE CIRURGIA INTRAOCULAR STRAYLIGHT AND CONTRAST SENSITIVITY TWO MONTHS AFTER LASIK: Intraocular straylight measurement as a

More information

Enhancement outcomes after photorefractive keratectomy and laser in situ keratomileusis using topographically guided excimer laser photoablation

Enhancement outcomes after photorefractive keratectomy and laser in situ keratomileusis using topographically guided excimer laser photoablation J CATARACT REFRACT SURG - VOL 31, DECEMBER 2005 Enhancement outcomes after photorefractive keratectomy and laser in situ keratomileusis using topographically guided excimer laser photoablation Leopoldo

More information

Alexandria s Guide to LASIK

Alexandria s Guide to LASIK Alexandria s Guide to LASIK A Community Service Project sponsored by: Wallace Laser Center Your Guide To A Successful LASIK Procedure The word LASIK is actually an acronym for Laser Assisted In-Situ Keratomileusis.

More information

Walter Sekundo, MD, Katrin Bönicke, MD, Peter Mattausch, Wolfgang Wiegand, MD

Walter Sekundo, MD, Katrin Bönicke, MD, Peter Mattausch, Wolfgang Wiegand, MD Six-year follow-up of laser in situ keratomileusis for moderate and extreme myopia using a firstgeneration excimer laser and microkeratome Walter Sekundo, MD, Katrin Bönicke, MD, Peter Mattausch, Wolfgang

More information

The optical quality of the human eye suffers

The optical quality of the human eye suffers Operative Correction of Ocular Aberrations to Improve Visual Acuity Theo Seiler, MD, PhD; Michael Mrochen, PhD; Maik Kaemmerer, PhD ABSTRACT PURPOSE: Optical aberrations of the human eye degrade the quality

More information

Jin Kook Kim, MD, Sung Soo Kim, MD, Hyung Keun Lee, MD, In Sik Lee, MD, Gong Je Seong, MD, Eung Kweon Kim, MD, Sueng Han Han, MD

Jin Kook Kim, MD, Sung Soo Kim, MD, Hyung Keun Lee, MD, In Sik Lee, MD, Gong Je Seong, MD, Eung Kweon Kim, MD, Sueng Han Han, MD articles Laser in situ keratomileusis versus laser-assisted subepithelial keratectomy for the correction of high myopia Jin Kook Kim, MD, Sung Soo Kim, MD, Hyung Keun Lee, MD, In Sik Lee, MD, Gong Je Seong,

More information

Innovations in Refractive Surgery

Innovations in Refractive Surgery Innovations in Refractive Surgery Edward E. Manche, MD Byers Eye Institute Stanford University School of Medicine Financial Interest Disclosures AMO D Best Doctors A Calhoun Vision R Avellino Laboratories

More information

Prophylactic Effects of Mitomycin-C on Regression and Haze Formation in Photorefractive Keratectomy

Prophylactic Effects of Mitomycin-C on Regression and Haze Formation in Photorefractive Keratectomy Prophylactic Effects of Mitomycin-C on Regression and Haze Formation in Photorefractive Keratectomy Hassan Hashemi, MD 1,2 ; Mohammad-Reza Taheri,MD 2 ; Akbar Fotouhi, MD, PhD 3 ABSTRACT Purpose: To study

More information