The only part of the eye that is adjustable for the refraction (focusing) of light rays is the:
A)vitreous humor
B)lens
C)cornea
D)iris

Question

Quizplus · Accepted Answer

The lens is the only part of the eye that can change shape to adjust the refraction of light rays. The cornea is also involved in refraction, but it does not have the ability to adjust its shape like the lens does. The vitreous humor and iris do not play a role in adjusting the refraction of light rays.

The Only Part of the Eye That Is Adjustable for the Refraction