The retina, 350 microns thick membrane, has to transform the light stimulus into visual data. Cones and rods are essential to this phototransduction. Retina structure is now well explored using investigations such as echography, and angiography. Fluorescein angiography and indocyanin green angiography have improved our knowledge of many ocular diseases, especially in age related macular degeneration and in diabetic retinopathy.
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