What structure changes the shape of the lens of the eye?
a. Ciliary muscle
b. Iris
c. Retina
d. Optic nerve
ANS: A
The ciliary body has a circular muscle that surrounds the edge of the lens and is connected to the lens by suspensory ligaments. The shape of the lens is changed by the ciliary muscle, which permits the focusing of light from objects at varying distances.
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