Explain human eye briefly

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Explain human eye briefly

Posted by Kajal Pahwa 6 years, 9 months ago

CBSE > Class 08 > Science

2 answers

Kanvi ..?? 6 years, 9 months ago

The human eye is very small,about 2.5 cm in length.The eyelids act as shutters of the eye and protect them from injury.Internally,the eye is made up of the following parts. Pupil Iris Sclera Cornea Retina Ciliary muscels Lens Optic nerve Blind spot

3Thank You

Gaurav Seth 6 years, 9 months ago

Functions of the Parts of Human Eye

Sclera
Protects and contains internal parts

Cornea
Cornea is responsible for maximum refraction of incident light

Aqueous Humour
Prevents collapse of the eye due to atmospheric pressure changes

Iris
Iris controls the light entering the eye by adjusting the size of pupil

Crystalline 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.

5Thank You

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