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Presbyopia
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Presbyopia is the inability to focus on objects up close.
During normal vision, light passes through the cornea, and then through the pupil, which is actually a hole in the colored part of the eye. Light then passes through the lens where it is focused at a point on the retina at the back of the eye. At this point, the image is converted into electrical signals that are sent to the brain.
The lens is flexible ... more
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