Aging: Presbyopia is the loss of near reading ability due to loss of accommodation of your lens/lens zonules in your eye associated with aging requiring use of reading correction. This starts approximately 40 years old.
Answered 4/18/2014
6.1k views
Lens gets too stiff: So it can't focus light on the retina as objects get closer.
Answered 10/7/2012
5.6k views
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