Question

Draw a labelled diagram of the human eye. List atleast four names of its parts and state the function of any two parta.
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Answer 1

★ Answer ★

A human eye is roughly 2.3 cm in diameter and is almost a spherical ball filled with some fluid. It consists of the following parts:

• Iris

• Lens

• Retina

• Optic nerves

• Iris: A dark muscular tissue and ring - like structure behind the cornea is known as the iris. The colour of the iris actually indicates the colour of the eye. The iris also helps regulate or adjust exposure by adjusting the iris. The iris regulates the amount of light entering the eyes by controlling the diameter and size of the pupil.

• Lens: Behind the pupil, there is a transparent structure called a lens. By the action of ciliary muscles, it changes its shape to focus light on the retina. It becomes thinner to focus distant objects and becomes thicker to focus nearby objects.

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CreativeAB

• The Genius •