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describe the main part of human eyes? Explain its focusing action। ✧✧
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Answers
Explanation:
important part of human eye retina ,cornea aqueous humour ,Iris, Pupil ,ciliary muscles optic nerve viterious humour eyeBall
retina
- it is a light sensitive screen inside the eye on which image is formed
- it contains rods and corn cells Rod type cell respond to light sensitive corn types respond to colour and intensity
- cornea
it is a thin membrane which covers the eyeball it acts like a lens which reflect the light entering the eye
- aqueous humor
it is a fluid which feels the space between cornea and eyelens it also absorb a shock
- iris
it controls amount of light entering the eye by changing the size of a pupil
- pupil
it is a ball through which the light enter the eye it appears black because light falling on it goes into eye and doesn't come back
- ciliary muscles
these are the muscles which are attached to eyelens and can modified the shape of eyelens which leads to variation in focal length
- eyelens
it is a convex lens made of transparent and flexible Jelly like material it curvature can be adjusted with help of ciliary muscles
- optic nerve
the nerve that takes the image to the brain in the form of electric signals
- viterious humor
the transfer and g e l a t i n e t tissue feeling the my behind the lens it also protect from shocks
- eyeball
it is approximately spherical in shape with diameter 2.3 centimetre
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