A person cannot see things clearly which are farther than 200 cm.
() Name the defect
(i) State its 2 causes
(iii) Prescribe lens for its correction.
(iv) Also calculate power of corrected lens.
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Answer:
(1) The defect is Myopia
(2)
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the defect is called myopia
nearsightedness can also be caused by the cornea and or lens beinf too curved for the length of eyeball
the focal length of a glass is called df
knowing that df =K+d,we get :D=K(1+ d x K)
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