An older adult may complain of difficulty driving at night. Which physiological change in the eye can explain this problem?
a. The pupils become smaller.
b. Peripheral vision widens.
c. Accommodation is increased.
d. The ability to discern the colors red and green is impaired.
A
The pupils become smaller during the aging process; therefore, the amount of light reaching the retina is reduced. As a consequence, the eyes of the older adult take longer to accommodate to darkness and glare, making it more difficult to drive at night. Peripheral vision decreases, and the ability to discern colors is impaired (especially blues and greens).
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