1 Resolving Ocular Headaches, Dry Eyes, and Visual Discomfort
2 As we have moved from a society of farming and manufacturing to one where technology dominates the work place, common visual deficiencies that may have produced only minor discomfort in the past have now become problematic. According to,computers are the number one cause of workplace discomfort.
3 Digital devices now dominate many of our lives.
4 Because of this prolonged computer use, many of us experience headaches, fatigue, and eyestrain.
5 Ocular Symptoms of Eye Fatigue Headaches Burning Watering Itching Dryness Blurred vision Double vision Foreign body sensation Soreness Strain
6 Computer Vision Syndrome (CVS) Computer Vision Syndrome refers to vision problems as well as other symptoms related to computer use. These symptoms include eyestrain, dry or burning eyes, blurred vision, headaches, double vision, distorted color vision, and neck and backaches. 15 years ago, 10 years ago and perhaps even 5 years ago, not much thought was given to this
8 Convergence Insufficiency Convergence Insufficiency (CI) is a common vision disorder in which the eyes do not work at near easily. It is considered an eye teaming problem in which the eyes have a strong tendency to drift outward when reading or doing close work.
9 Convergence Insufficiency frequently goes undetected in school age children because proper testing is not included in eye tests in a pediatrician's office nor in school vision screenings. Patients typically present as teenagers or in early adulthood, complaining of gradually worsening eyestrain, headache, blurred vision after brief periods of reading, and occasional double vision when reading.
10 Ocular Symptoms of Convergence Insufficiency Headaches Burning Watering Itching Dryness Blurred vision Double vision Foreign body sensation Soreness Strain Do these symptoms look familiar?
11 Ocular Symptoms of Eye Fatigue Headaches Burning Watering Itching Dryness Blurred vision Double vision Foreign body sensation Soreness Strain Here they are again
12 Ocular Symptoms of CVS Headaches Burning Watering Itching Dryness Blurred vision Double vision Foreign body sensation Soreness Strain Three conditions, same symptoms!
13 Eye Posture We all have a natural position of rest for our eyes. This is referred to as a Phoria in the absence of double vision. If unable to maintain binocular fusion, it is called a Tropia. Patients with Tropia either suppress the vision in one eye, or see double. There are basically three types of phorias
14 Vertical Phoria A vertical phoria is when one eye sits higher than the other. Commonly, a patient will present stating you are the fifth eye doctor I have been to, I can t see out of any glasses I have ever had! A vertical prism prescription usually solves this patient s problem.
15 Esophoria Esophoria is when the eyes turn in slightly.
16 Exophoria Exophoria is when the eyes turn out slightly. Most people are naturally Exophoric. Those with Exophoria are most likely to suffer from Eye Fatigue, Computer Vision Syndrome, or Convergence Insufficiency
17 Small amounts of exophoria can induce significant discomfort during reading and computer use. This small amount of eye misalignment may not be significant in those who do not spend much time on near point tasks. This is why more people now suffer from eye-related headaches
18 pro pri o cep tion noun Physiology Proprioception refers to our muscle sense which is our ability to know where our body parts are located. For instance, if you close your eyes and hold your arms out to your sides, you know where your hands are located in space. Police officers use this principle in field sobriety tests. Alcohol impairs proprioceptive ability, thus impairing one s ability to stick their arms out to their sides and touch their nose.
19 Our eye muscles have the same proprioceptive receptors as our skeletal muscle, but do not have the same load compensating mechanism. If our eyes are forcibly moved in the dark (with numbing drops and forceps), we can not tell which direction they are pointing. However if we voluntarily move our eyes in darkness or with them closed, we know which way they are pointing. From this we know that the proprioceptive receptors in our eye muscles do not give us a conscious awareness of our eye position
20 Proprioceptive Disparity Patients with symptoms of Eye Fatigue, Computer Vision Syndrome, Convergence Insufficiency, and Exophoria often have a Proprioceptive Disparity Where they think their eyes are focused (closer) and where their eyes are actually focused (farther) does not match See next slide for illustration
21 Proprioceptive Disparity Proprioceptive disparity indicates that a persons Focal Distance, the object at which they are looking is closer than their Vergence Distance, the point their eyes are actually converging to.
22 Cover Test So When someone has headaches or any of the symptoms on our list, how do we determine if the problem stems from the eyes? A simple method is a cover test. To test yourself, fixate on a small object that is feet away. Using your hand, cover one eye and then the other. If you are Exophoric, the object will appear to move in the same direction as your hand. This is repeated with a near object such as a pencil held at reading distance, (about 16 ). The near object will often show more of a jump than the distance object did. Patients with symptoms of Eye Fatigue, CVS, and CI, (headaches, burning, gritty feeling, etc) and are Exophoric by cover test likely have a Proprioceptive Disparity.
23 Opt-Align is the first device to accurately measure Proprioceptive Disparity. With Opt-Align for the first time doctors can effectively measure the disparity between the patient s focusing and converging points.
24 So what can be done? Anti-Fatigue Lenses incorporate a small amount of prism to correct for the difference between one s focal point and convergence point. Prism bends the light to wear our eyes are focused.
26 Lasik Patients It has been noted that prism as well as minus (nearsighted) lenses can relieve the symptoms of Proprioceptive Disparity. There are many patients that complain of dry gritty eyes or uncomfortable vision after Lasik surgery. These patients often return to their surgeon and are found to have normal vision when reading the eye chart. They may be told their eyes are dry and prescribed lubricant eye drops (with little success). The problems these patients have are likely related to the fact that after surgery, corrective lenses (glasses or contacts) are no longer worn. The minus power in their previous lenses was masking their Proprioceptive Disparity. They are now symptomatic. Prescribing prismatic glasses, (even though the power may be zero) to use for computer and near work will likely alleviate their symptoms!
27 Next steps If you feel that you or a loved one is suffering from symptoms as outlined in this presentation, please call our office to schedule an appointment. Our office has one of the first Opt-Align units in the country. It is our privilege to offer the most advanced diagnostic equipment available to our patients. (623)
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