Case 8-3. Geographic Atrophy
An 85-year-old man with a 10 year history of macular degeneration had a visual acuity of 20/200 in both eyes, which had been stable for the past three years. Slit-lamp examination of his right eye (A) showed geographic atrophy throughout the macula, with no subretinal fluid, hemorrhage, or exudate.
A horizontal OCT scan (B) was obtained through the macula and showed a well-defined region of increased optical reflectivity from the choroid due to increased penetration of both incident and reflected light through the atrophic pigment epithelium. The contour of the foveal depression was altered, and the normal minimally reflective band corresponding to the retinal photoreceptor layer was absent in the image.
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