Parts of the Eye

Conjunctiva

It is the outer covering of eye. It has got no visual function. It is inflamed in conjunctivitis or in trauma. Diseases of conjunctiva are easy to treat.

Sclera

This is the tough outer protective coat of the eye. It does not have blood vessels. It is rearely inflamed in arthritic like condition called scleritis.

Cornea

It is the clear transperant covering of the eye. It is a very sensitive structure and does not have blood vessels. In infection it gets ulcers which is very serious because any scarring will impair vision.

Lens

Also called the crystalline lens helps to focus images on to the retina. In age , disease or trauma it becomes opaque and forms a cataract.

Iris

It is a spongy middle layer of the eye which forms the pupil. It contracts and dilates to control the amount of light entering the eye.In iritis this tissue is inflamed.

Ciliary Body

This is a continuation of the middle layer of the eye ball. It has muscles which relax or contract to change the curvature of the lens whose ligaments are attached to it.

Aquous humor

This is the fluid which is present in front of the lens. It is responsible for maintaining the correct pressure of the eye ball.

Retina

This is the light sensitive inner layer of the eye. This is responsible for capturing focussed images for transmission to brain. It can be involoved in disease, injury or trauma.Any scarring will impair vision. The perpeheral retina is responsible for night vision and perepheral vision. The central retina called the macula is responsible for central and reading vision.

Vitreous Humor

This is the jelly like substance in front of the retina.Later on life it turns from jelly to liquid.

Optic nerve

This nerve carries impulses from retina to brain.

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