Question

An eye has a near points distances of 0.75.m . What sort of lens in spectacles would be needed to reduce the near point distance to 0.25m? Also calculate the power of required. Is this eye long-sighted or short-sighted?​

Answer 1

distances of the eye=0.75

lens of the spectacles=0.25

=0.75 -0.25

=0.5.

so it is a short sight