a student is not able to read topics written on the board but is ever to read his books topics which is kept in his head is fit talked to him about sightedness. (a) what are you thinking about his sightedness by which he is suffering from? write its name. (b) what are the causes of such sightedness? (c) which type of lens will be prescribed for him?
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Answer:
(a) myopia
(b) 2 reasons
1. decrease in focal length of eye lens
2.elongation of eyeball
(c) concave lens
Explanation:
as in myopia image is formed in front of retina rather than on it.
this can be due to decreased focal length of eye lens or can be due to its elongation ,that also decrease the focal length
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