Question

Describe, giving diagram, the structure of the eye and explain the process vision.

Answer 1

The cornea is the thin membrane that lies at the front of the eyes. Iris and pupil found behind the cornea. The crystalline lens found behind the pupil acts as like a camera lens by focusing light onto the retina which is present at the back of the eye.

The process of vision-

Light enters the Eye through the cornea. After passing through the cornea, light travels through the pupil. Behind the cornea, there is a structure called iris which controls the size of the pupil. Behind the iris, there is the lens that focuses light on the retina and forms an inverted image of the object on the retina. The retina contains light-sensitive cells that get activated and generate electrical signals. These signals are sent to the brain by the optic nerve.