PRESBYOPIA
Presbyopia
Presbyopia is a condition where, with age, the eye exhibits a progressively diminished ability to focus on near objects. Presbyopia’s exact mechanisms are not known with certainty; the research evidence most strongly supports a loss of elasticity of the crystalline lens, although changes in the lens’ curvature from continual growth and loss of power of the ciliary muscles have also been postulated as its cause.The above text is a snippet from Wikipedia: Presbyopia
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presbyopia
Noun
The above text is a snippet from Wiktionary: presbyopia
and as such is available under the Creative Commons Attribution/Share-Alike License.