The amount of light entering into eye can be controlled and regulated by-

Options

A. Pupil
B. Iris
C. Cornea
D. Retina

Answer

A

Explanation

The amount of light entering into eye can be controlled and regulated by Pupil.
In low-light conditions, the pupil dilates so more light can reach the retina to improve night vision. In bright conditions, the pupil constricts to limit how much light enters the eye (too much light can cause glare and discomfort, and it may even damage the lens and retina).