EVAN OTO / SCIENCE PHOTO LIBRARY EVAN OTO / SCIENCE PHOTO LIBRARY
An illustration of dry age-related macular degeneration, a medical condition in which damage to the retina leads to progressive vision loss in one's central field of vision. The macula is a region near the centre of the retina with a high density of photoreceptors responsible for high acuity vision. In dry AMD, cellular debris called drusen accumulate between the retinal pigment epithelium and the choroid. As a result, photoreceptor cells in the retina can no longer receive nutrients or pass on waste to the blood vessels in the choroid and become damaged.
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