What structure is avascular, external, and its function is to refract light rays?

Name: What structure is avascular, external, and its function is to refract light rays?
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Quizplus · Accepted Answer

The structure that is avascular, external, and functions to refract light rays is the cornea. The iris controls the size of the pupil and the amount of light that enters the eye. The sclera is the white, tough outer covering of the eye. The retina is the innermost layer of the eye that contains photoreceptor cells that detect light.

What Structure Is Avascular, External, and Its Function Is to Refract