The amount of light entering the eye is regulated by the size of the
A) optic orbits.
B) lens.
C) sclera.
D) pupil.
E) conjunctiva.

Question

Quizplus · Accepted Answer

The pupil is the black circular aperture in the center of the iris through which light enters the eye. The size of the pupil is regulated by the iris muscles and controls the amount of light entering the eye. When the pupil constricts, less light enters the eye, and when it dilates, more light enters the eye.

The Amount of Light Entering the Eye Is Regulated by the Size