CBSE BOARD X, asked by aakif2484, 10 months ago

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Answered by amitansuparida202
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presbyopia:- it is an old age disease. at old age the ciliary muscles loose their elasticity and cannot change the focal length of eye lens effectively.

astigmatism:- it is the defect of eye which occurs when cornea is not spherical in shape

scattering of light:- it is a optical phenomenon in which the particles of medium deviate direction of light

accomodation :- modification of focal length of eye lens by ciliary muscles to see objects at all possible direction

atmospheric refraction:- refraction of light at different levels of atmosphere is called atmospheric refraction

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