Question

Structure of human eye and exeplation in short and easy word

Answer 1

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- The light rays coming from the object first enter the eyes through cornea.

- A muscular diaphragm behind cornea controlled is know as iris which can control amount of light that enter into the eye.

- An aperture of an eye behind cornea at the centre is known as pupil whose size can be controlled by Iris.

- After passing through the pupil, the light rays are incident on a jelly like elastic material known as eye lens.

- The muscular structures which hold the eye-lens in its position are known as ciliary muscle.

- They change the focal length of an eye-lens by changing its thickness.

- Position of image where image formed due to refraction by eye lens is called ratina.

- When the light rays fall on additive retina, the light sensitive cells generate electrical signals.

- The signals are sent to the Optic nerve where the image of an image of object is interpreted.

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