Presbyopia occurs in older individuals because
a. the macula degenerates. c. of the development of glaucoma.
b. the lens becomes more dense. d. it is associated with cataract development.
B
Presbyopia is a condition where the lens cortex becomes more dense, compromising its ability to change shape and focus on near objects; it is responsible for farsightedness. The macula degenerates with age, causing loss of central vision. Individuals experiencing this change require the use of magnification to compensate for visual loss. Increased intraocular pressure and inability of aqueous humor to flow out into collecting channels places pressure on the optic nerve and causes glaucoma. Cataracts cause progressively blurred distance vision.
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