Many parts of the eye work to focus or control light except the a. pupil
b . lens
c. retina.
d. cornea.

The correct answer is - c. retina

Explanation:

The lens is made out of flexible and transparent tissue and is found just behind the iris and the pupil. It is the second aspect of your eye, after the cornea, that assists with focused light and pictures on your retina. The iris and the pupil of the eye controls the amount of light to allow into the back of the eye. At the point in dark, our pupil become exceptionally large, allowing in more light.  

The retina is the light-touchy centering screen. Inside, there's two sorts of liquid, one watery behind the focal point, and further back, a thicker one that enables the eyeball to hold its shape

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b.