Lasik Xtra in: Hyperopia AK Xtra Clear cornea cataract surgery
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1 Lasik Xtra in: Hyperopia AK Xtra Clear cornea cataract surgery A. John Kanellopoulos, M.D. Clinical Profesor of Ophthalmology New York University School of Medicine, New York, NY, USA Laservision.gr Institute, Athens, Greece AJK is a consultant for Alcon, Wavelight and Avedro.
2 Crosslinking and Long-Term Hyperopic LASIK Stability Initial Clinical Findings in Contralateral Eye Study
3 Introduction CXL has been an established treatment for ectasia internationally, although not yet FDA approved, there are several US studies in progress We introduced prophylactic higher fluence CXL in routine LASIK cases 5 years ago, as a means to stabilize the higher myopic corrections and reduce the chance for ectasia Hyperopic LASIK is often thought to regress following the first year. The etiology for this has been elusive,several theories exist: A- latent hyperopia masked by accommodative spasm, B- epithelial hypertrophy, and C-an intrinsic biomechanical effect of hyperopic LASIK, that results in midperipheral steepening and central flattening We have employed topography-guided excimer abation in our hyperopic LASIK treatments for almost a decade in order to address significant angle kappa in hyperopia
4 Purpose 1-Evaluation of safety and efficacy of intrastromal cross-linking in a contralateral eye study in routine hyperopic LASIK. 2-We speculated that the CXL would help stabilize the cornea steepening result of hyperopic LASIK, that may regress within the first 2 years. Crosslinking and Long-Term Hyperopic Lasik Stability
5 Methods 27 consecutive patients Mean sphere (+1.25 to +6.5) Mean cyl (Plano to 3.25) Consecutive hyperopic and hyperopic astigmatic bilateral topography-guided LASIK utilizing the Wavelight (Erlagen, Germany) platform Allegretto 400Hxz Eye-Q excimer laser and femtosecond laser flap creation Randomized Control group: One eye randomised to no adjunct CXL. Treatment group: the contralateral eye was treated with CXL: 1 minute of 30mW/ cm 2 CXL (KXL device, Avedro, Waltham, MA, USA) after in-the-flap administration of 1 drop of 0.1% sodium phosphate riboflavin Mean follow up of 23 months (22-35)
6 A FS200 femto (Alcon, Ft Worth, USA) 9.5mm hyperopic LASIK flap. It s nasal decentration is evident in reference to the red circle that represents the pupil-this is done in order to accommodate the topography-guided ablation that will be also nasaly decentered to accommodate angle kapa
7 A drop of 0.1% riboflavin sodium phosphate solution, just prior to its spread over the exposed stromal bed
8 Flap repositioned following stromal soak with riboflavin, that is now visible as yellow tinge in the stroma
9 CXL evidence viewed in corneal OCT (Optovue, CA, USA) in LASIK Xtra group
10 Results Outcome measures: Peri-operative refractive error Keratometric, topographic and topometric measurements Mean regression from treatment: Control cases: D CXL cases: D
11 LASIK Control Group Lasik Xtra Group
12 LASIK Control Group Lasik Xtra Group
13 Comparison of Keratometric Stability 47 Mean Keratometry (D) Lasik Xtra Std Lasik 42 Pre op 1m 3m 6m 12m 24m
14 LASIK Control Group 1 year
15 LASIK CXL Group 1 year Crosslinking and Long-Term Hyperopic Lasik Stability
16 Conclusions Combination of CXL in routine hyperopic and hyperopic-astigmatic LASIK appears to significantly stabilize its long term effect, possibly by modulating a hyperopic LASIK biomechanical response. These data support our theory that long term regression in hyperopic and hyperopicastigmatic LASIK may involve corneal biomechanical changes.
17 Enhancement of femtosecond astigmatic keratotomy (fsak) with combined simultaneous high fluence CXL (hfcxl) Kanellopoulos: Presented at AAO 2012
18 Methods 15 eyes of 13 consecutive patients Standard follow-up up to 6 months Protocol: Two 30 o arcuate OCT guided fsak incisions were performed with the LenSx laser at the 7mm OZ, 85% depth manual incision separation with a Sinskey hook 1 drop of 0.1% riboflavin sodium phosphate was administered in one of the incisions 60 seconds soak
19 Results The CXL incisions showed statistical significance in the meridional astigmatic change to the non- CXL incisions: at day1 (2.75D to 1.75D) week 1 (2.50D to 1.65D) month1 (2.25D to 1.45D) month 3 (2.25D to 1.25D).
20 AK Xtra Post Penetrating Keratoplasty
21 video
22 Astigmatic change following LenSx-placed AK insiions on the steep axis
23 Astigmatic change following high-fluence CXL enhancement
24 Femto AK combined with CXL! 30mW cm2 X 3 min Kanellopoulos 2012 After AK AK after high fluence CXL
25 Older AK + LASIK after enhanced with AK Xtra
26 High fluence CXL AK-enhancement
27 What happens to the cornea topometric parameters with clear cornea cataract surgery?
28 Cataract surgery patient: toric IOL or AK or LASIK after?
29 Cataract surgery patient one eye randomized to flash CXL:
30 Guess which eye of this same patient has flash CXL with the clear cornea cataract incision?
31 flashcxl of clear cornea catarct incisions! Kanellopoulos 2012 Control Flash CXL
32 Our current CXL protocols 1-Athens Protocol: topoprk +10 x 10mw/cm 2 2-LASIK Xtra: 1 (90 ) 30mW/cm 2 all HYPEROPES 2-PRK Xtra: 1 (90 ) 30mW/cm 2 3- femtoak Xtra: 3 30mw/cm 2- no soaking! 4-Cataract incision Xtra: 45mW/cm2 for 2.5 min 5-TransepiCXL: 0.25% ribo + 30mW X 3 6-Infection: 0.25% riboflavin + 45mW/cm 2 x 5
33 Conclusions: very high fluence CXL LASIK Xtra may be the prefered way to perform LASIK in myopes, we have proven that it maybe neccesary for long term stability of hyperopic LASIK This novel combination of hfcxl may significantly enhance fsak efficacy allowing for a smaller arc treatment, potentially higher stability and lesser ocular surface symptoms. This novel combination of hfcxl may significantly enhance steep axis flattening in clear cornea cataract surgery.
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