A person uses lens of +3D to normalise vision .Near pt. of hypermetropic eyes is?

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Q. The near-point of a hypermetropic eye is

75 cm

from the eye. What is the power of the lens required to enable the person to read a book held at

25 cm

from the eye?

Name the eye defect in which eye lens becomes cloudy or milky. Mention the method for its correction. A person uses a lens of power -1.0 D for correcting his distant vision and for correcting his near vision he uses a lens of power + 2.0 D. Calculate the focal length of the lenses required to correct these defects. Explain why a normal eye is not able to see clearly the objects placed closer than the near points.

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