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Presbyopia
Definition:
Presbyopia is an age-associated progressive loss of the focusing power of the lens. This results in difficulty seeing objects close-up. Causes, incidence, and risk factors:
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The focusing power of the eye, which depends upon the inherent elasticity of the lens, is gradually lost as people age. This results in a slow decrease in the ability of the eye to focus on objects nearby. People usually notice the condition around age 45, when they realize that they need to hold reading materials further away in order to focus on them. Presbyopia is a natural part of the aging process and affects everyone.
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