We see with the help of eyes . When light enters the eye, it passes through the cornea, iris and lens before reaching the retina. In the retina, millions of light sensitive cells called rods and cones react to the light. This results in a series of complex chemical reactions. The se reactions form electrical impulses in the optic nerve, which sends them to the brain. The brain interprets these signals as an image.
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| Human Eye |
Size
The eyes are small in size. Each eye is about 2.5 cm wide, 2.5 cm deep and 2.3 cm tall.
Socket and Lid
The eye socket is a bony cavity which contains the eyeball. The front part of the eye is protected by the eyelid, which keeps the eyes moist and clean.
Macula
Macula is a region of the retina. It is responsible for providing sharp vision and fine details that are required for reading and driving.
Lens
The eye lens is a biconvex lens with a diameter of about 1 cm. The lens is used to fine-tune vision.
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