Question

what is the working of human eye?​

Answer 1

Answer:

Working of the Eye:

Light rays reflected from an object pass through the conjunctiva, cornea, pupil before falling on the biconvex lens. The size of the pupil determines the amount of light that will enter into the eye ball. The size of the pupil enlarges when the intensity of the light is low and the size diminishes when the intensity is high.

The light rays are then focussed on the retina by the biconvex lens, so that a sharp inverted image is formed on the retina. The impression of the inverted retinal image is carried by the optic nerve to the brain where it is being interpreted. The eye can see objects both far and nearby adjusting the focal length of lens i.e., by changing the curvature of the lens. This is called as the power of accommodation of the eye.

Normally the lens is focussed for distant object in animals; in this condition the lens is kept flattened by the suspensory ligaments. When near objects are viewed, the lens become more complex by the activity of the ciliary muscles, the curvature of the lens is reduced, pupil contracts and an inverted image of the object is formed on the retina.

In higher mammals including man the fields of vision of two eyes overlap or even coincide. It is known as binocular vision. However, in some animals like rabbit, each eye covers a different field of vision, this is called monocular vision.

Answer 2

Explanation:

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