(a) What is short-sightedness? State the two causes of short-sightedness (or myopia). With the help of ray diagrams, show :
(1) the eye-defect short-sightedness.
(2) correction of short-sightedness by using a lens.
(b) A person having short-sightedness cannot see objects clearly beyond a distance of 1.5 m. What would be the nature and power of the corrective lens used to restore proper vision?
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(a) Short Sightedness is that defect of vision due to which a person can see nearby objects clearly but cannot see distant objects clearly.
Causes:
(1) Excessive curvature of the eye lens
(2) Elongation of the eyeball
Ray diagram for the below two are given above.
(i) eye-defect short sightedness
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