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F. De Alba, R. Mirza, W. Jay; The Role of Ocular Dominance in Patients Presenting With Asymmetric Macular Degeneration . Invest. Ophthalmol. Vis. Sci. 2005;46(13):625.
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Purpose: This study’s aim is to look at ocular dominance in patients presenting with asymmetric macular degeneration. Patients with end stage disease in one eye and relative good vision in the other eye were tested for ocular dominance using three established methods; this was correlated with their handedness. This study looks at the method of testing ocular dominance and characteristics of patients presenting with asymmetric macular degeneration. Methods: 10 patients who presented to the retina clinics with end stage macular degeneration (either wet or dry) and vision worse than or equal to 20/200 in one eye were studied. The criterion for the other eye was 20/40 or better. Age, gender, race, visual acuity, and handedness were noted. Three tests for sightedness were used. (1) Patients were given a card with a hole in it and asked to sight a letter on the snellen chart. They were then asked to bring the card to their eye. (2) Patients were asked to wink. (3) Patients were then asked which eye they would use to take a picture through a camera prior to the onset of their disease. Inter–test answers, as well as handedness, were taken into account to determine dominance. Results: Eight of ten patients presented with end–stage disease in their left eye. Of these, seven of these patients used their right eye to spot through the card, wink, and to take a picture. One of these spotted through the card and took a picture with his right eye, but winked with the left. Two patients presented with end–stage disease in their right eye. Of these, one spotted, winked, and took a picture with his left eye. The other spotted and winked with the left eye, but stated he used to take a picture with the right eye. All patients were right handed. Dominance was established by looking at the responses of all three tests and correlating it with handedness. Conclusions: Although this study is limited by its patient size, the conclusions are twofold. First, in our study 8 out of 10 patients winked with their dominant eye. This goes against previous belief that patients wink with their non–dominant eye. It appears that asking the patient which eye they took a picture with prior to onset of their disease and spotting through a card appear to be more reliable methods to test dominance. Secondly, the fact that only 1 out of the 10 patients presented with disease in his dominant eye suggests that dominance does not play a role in patients seeking medical care.
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