Question 13 / 15:  Why do people over 55 often need reading glasses?
a.  Their cornea no longer focuses correctly.
b.  Their lens no longer focuses correctly.
c.  Their eyeball has elongated with age, causing images to focus in front of their retina.
d.  Their retina has thinned with age, making vision more difficult.
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Biology 36 Sensory Systems MCQ

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