Question

Explain human eye with figure

Answer 1

Sclera Protects and contains internal parts Cornea Cornea is responsible for maximum refraction of incident lightAqueous Humour Prevents collapse of the eye due to atmospheric pressure changes Iris Iris controls the light entering the eye by  adjusting the size of pupilCrystalline Lens Focuses the light reflected by objects on the retina. Ciliary Muscles Alter focal length of the crystalline lens Retina Receives optical image and converts it to electrical impulses Vitreous Humour Maintains the shape of the eye Optic Nerve Carries electrical impulses to the brain. Brain interprets these impulses and produces the sense of vision.

Answer 2

Detailed Description of Human Eye

• Human Eye

The Human eye works on the reflection of light through a transparent living material which enable us to see the object .

• Cornea

The Front part of the eye is called Cornea. It is made up of a transparent Substance and bulging outward. The outer surface is convex in shape.

• Iris

It is situated just behind the cornea . It is coloured diaphragm . It has black coloured ring shaped membrane. It gives colour to the eye . Most of the Indians eyes are black or Brown.

• Pupil

It is a black hole situated between Iris .The Pupil appears black because no light is reflected from it. This control the amount of light entering into the eye if Light is bright then Pupil will compressed while in deep light The pupil will relaxed.

• Ciliary Muscles

These are attached to the islands and roid iBall full stop its change the thickness of eye lens while focusing. The focal length of the islands can be changed by change in its shapes, by action of these muscles.

• Eye Lens

It is a convex lens made of transparent soft and flexible material like jelly e made up of proteins. It held in the position by suspensory ligament , One end of this ligament is attached to the eye lens and their other end is attached to the ciliary muscles.

• Retina

The screen in which the image is formed in the eye lens is called it enough to stop it is behind eye lens and at the Black part of the eye. The retina of an eye just like a film in the camera. It is very delicate membrane having a large number of light sensitive cells .

• Blind Spot

it is a small area of retina which is insensitive to light where optic nerve leave the eye.