what are the functions of the various parts of a human eye
Answers
Sclera - protects and contains the internal parts
Cornea - refracts incident light
Aqueous humour - prevents the collapse of the eye due to atmospheric pressure changes
Iris - adjusts the size of pupil
Crystalline lens - focus the image of the retina
Ciliary muscle - alters focal length of crystalline lens
Retina - receives optical image
Vitreous humour - maintains the shape of eye
Optic nerve - carries electrical impulses to brain
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Answer:
The sclera, or white part of the eye, protects the eyeball. The pupil, or black dot at the centre of the eye, is an opening through which light can enter the eye. The iris, or coloured part of the eye, surrounds the pupil. It controls how much light enters the eye by changing the size of the pupil.