Components of the eye

Conjunctiva – The mucous membrane which protects and keeps the eye moist. It covers the front of the eye and lines the inside of the eyelids.

Iris The iris is a circular structure in the eye, responsible for controlling the amount of light passing into the eye.

Crystalline lens – A transparent structure behind the iris which focuses light onto the retina of the eye.

Vitreous humor – A substance filling the middle of the eye which gives the eyeball shape and form.

Sclera – The sclera is the white outer layer of the eye, which protects the eyeball.

Optic nerve – The nerve that carries signals from the eye to the brain.

Aqueous humour – A fluid in between the cornea and the iris which maintains eye pressure and rounded shape to the front of the eye.

Pupil – The pupil the black hole located in the centre of the eye. It allows light to enter the eye and strike the retina.

Retina – A layer at the back of the eye containing cells(photoreceptors) that trigger nerve impulses to the brain through the optic nerve.

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