A person uses a pens of power -2.0D for correcting his distant vision. For correcting his vision he uses lens of power +1.5D. What is the focal length of lens required to correct this disorder?
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Person uses a lens of power p = -2.0D
focal length required f = 1/-2.0 *100 = -50cm
Person uses a lens of power p = +1.5D
focal length f = 1/+1.5 * 100 = +66cm
focal length required f = 1/-2.0 *100 = -50cm
Person uses a lens of power p = +1.5D
focal length f = 1/+1.5 * 100 = +66cm
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