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Arcus senilis usually occurs in the cornea, 1 to 2 mm inside the lim-bus, but it will not progress to interference with vision. The major age-related change of the cornea is degeneration of the endothelial cells lining its inner surface. Progressive degeneration can eventually result in failure to keep the cornea free of extracellular fluid. The resulting corneal edema and accompanying hazy appearance interferes with vision and may require corneal transplantation. The hazy appearance of the cornea requires referral to an ophthalmologist.

Tags: Cornea

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