Question

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Answer 1

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Question:-

What is human eye ?

Explanation:

• human eye is an important instrument which enables living organism to you not only look at objects but also to appreciate the beauty behind the object.
• it is nature's gift to living beings producing sensation of vision.

structure of Eye :-

the eye has a roughly sperical shape. The outer coat of the eye is white. It is tough so that it can protect the interior of the eye from accident. It's transparent font part is called Cornea . Behind the cornea, there is a dark muscularis structure called it iris.

In the Iris , there is a small opening called the pupil. the size of The pupil is controlled by the Iris . the Iris is that part of eye which gives it its distinctive colour.

Behind The Pupil of the eye is a lens which is thicker in the centre . the lens focus light on the back of the eyes , on a layer called retina. the retina contains several nerve cell. Sensations felt by the nerve cell are then transmitted to the Brain through the Optic Nerve.

There are two kinds of cells --

• Cones , which are sensitive to bright light .
• Rods, which are sensitive to dim light.

at the junction of the optic nerve and the retina, there are no sensory cells, so no vision is possible at that spot. This is called the Blind Spot.

Answer 2

Answer:

human eye is an important instrument which enables living organism to you not only look at objects but also to appreciate the beauty behind the object.it is nature's gift to living beings producing sensation of vision.

the eye has a roughly sperical shape. The outer coat of the eye is white. It is tough so that it can protect the interior of the eye from accident. It's transparent font part is called Cornea . Behind the cornea, there is a dark muscularis structure called it iris.