Question

Name the following:-
The layer of the wall of the eye-ball that corresponds to the black lining of the bix of a camera

Answer 1

Hint:This part is present in the back of the eye where the lens can focus. This part of the eye contains several nerve cells.

Complete answer:
The eye has a rounded shape. The outer coating of the eye is dark. It's hard to shield the inside of the eye from injuries. Its translucent front component is known as cornea (Fig. 16.14). Below the cornea is a dark muscle layer called iris. There is a small hole in the iris called the pupil. The size of the student is regulated by the iris. The iris is the part of the eye that gives it its distinctive hue. When we say that a person has green eyes, we simply apply to the colour of the iris. The iris controls the amount of light entering the eye. Below the eye pupil is the lens. The lens directs light on the back of the eye, on a membrane called the retina. The retina comprises a variety of nerve cells. Sensations of the nerve cells are then transferred to the brain via the optic nerve, which is thicker in the centre.

The sheet of the wall of the eyeball that corresponds to the black line of the camera box is Retina. The retina is a thin film of tissue that forms the back of the eye to the inside. It is situated in the periphery of the optic nerve. It acts like a film in a camera. The light rays come to the retina of the regular eye. Then the retina converts light rays as light impulses by millions of very small nerve ends, and then transfers these light impulses via more than a million nerve fibres to the optic nerve. The retina absorbs the image which is focused in the cornea from the inner lens of the eye and converts the image into electrical impulses that are transported through the optic nerve to the brain. As a consequence, the image is created on the retina and we can see the image.

Note:Eye is such a wonderful instrument that it can clearly see distant objects as well as objects in the nearby area. The minimum distance at which the eye can see objects varies considerably with age. The most convenient distance to read with a regular eye is around 25 cm.