Question

(◍•ᴗ•◍)✧*。(◍•ᴗ•◍)✧*。(◍•ᴗ•◍)✧*。❤️❤️ write the construction and working of human eye in detail. ❤️❤️(♡ω♡ ) ~♪(◍•ᴗ•◍)❤​

Answer 1

Explanation:

Construction and work of human eye : -

The front part of the eye called cornea, is made of transparent substance and its outer surface is convex in shape. It is through cornea that the light coming from objects enters the eyes. Just behind the cornea is iris which is also called coloured diaphragm. A hole in the middle of the iris is called pupil. Then behind it is the eye lens which is a convex lens. It is due to the support of ciliary muscles that the eye lens is held in position. Eye lens is flexible and thus can change its focal length and shape with the help of ciliary muscles.

The light rays coming from the object enter the eyes through pupil and falls on eye lens. The eye lens then converge the light rays and produce an image of the object on retina which is real and inverted. Retina has large number of light sensitive cells which can generate electrical signals. After the image is formed on the retina it sends electrical signals to the brain and we have a sensation of image. Also, even though the image formed on retina is inverted out mind interprets it as erect.

Answer 2

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Working

The lens focuses light through the vitreous humor, a clear gel-like substance that fills the back of the eye and supports the retina. The retina receives the image that the cornea focuses through the eye's internal lens and transforms this image into electrical impulses that are carried by the optic nerve to the brain.

Construction

The front visible part of the eye is made up of the whitish sclera, a coloured iris, and the pupil. A thin layer called the conjunctiva sits on top of this. The front part is also called the anterior segment of the eye.