The adjustable ring of circular and radial muscles that controls the amount of light entering the eye is the
A) lens.
B) cornea.
C) pupil.
D) iris.
E) retina.

Name: The adjustable ring of circular and radial muscles that controls the amount of light entering the eye is the A) lens. B) cornea. C) pupil. D) iris. E) retina.
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Question

Quizplus · Accepted Answer

The iris is the adjustable ring of circular and radial muscles that controls the amount of light entering the eye.

The Adjustable Ring of Circular and Radial Muscles That Controls