doctor advised to use the power of corrected lens is +1.5D then what is the defect of vision
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Explanation:
A lens having a power +1.5 D will have a focal length of
P =1/f
+1.5 D = 1/f
f = 1/1.5 = 2/3 = + 0.67 m.
The focal length is + 0.67m.
The nature of lens is converging type or convex lens.
The defect of the eye is Hyperopia or far-sightedness.
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