A person needs lens of power -4.5 D for correction of his vision. Find the defect
and focal length of corrective lens.
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Since, power is in negative, the defect is
myopia.
Power of lens =100/f mt
-4.5D =100/f
f=100/-4.5
f=22.22223.
myopia.
Power of lens =100/f mt
-4.5D =100/f
f=100/-4.5
f=22.22223.
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