The ______ Regulates the Amount of Light Entering the Eyeball

Question

The ______ regulates the amount of light entering the eyeball through the pupil.
A)retina
B)cornea
C)iris
D)lens
E)fovea centralis

Accepted Answer

The iris is the part of the eye that regulates the size of the pupil, which in turn controls the amount of light that enters the eyeball. The retina is responsible for detecting light and transmitting signals to the brain, the cornea is the transparent outer layer of the eye that helps focus incoming light, the lens helps to further focus the light onto the retina, and the fovea centralis is the area of the retina responsible for sharp, detailed vision.