Q:

What is presbyopia (old-age vision) due to?

belongs to book: Examination Questions and Answers in Basic Anatomy and Physiology|Martin Caon|| Chapter number:14.4| Question number:10

waelhammad

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2022-10-19

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What is presbyopia (old-age vision) due to?

the loss of elasticity of the lens of the eye
the change in the curvature of the cornea
the gradual loss of cone cells from the retina
the deviation from a spherical eye-ball shape with aging.

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waelhammad

2022-10-19

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A: Presbyopia refers the progressive loss of the ability to focus on nearby objects (e.g. books) after about age 45–50. It is due to the lens becoming stiffer so being less able to ooze into the highly convex shape required to bring light from nearby objects to focus on the retina.

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