Question

Which lens (concave or convex) is used in spectacles for far sight and near sight?

Answer 1

hey mate your answer is
concave lens is used in spectacles for far sights
where as
convex lens is used in spectacles for near sight

Answer 2

if there is a defect in seeing far objects - concave lens is used.(near sightedness )

if there is a defect in seeing near objects- convex lens is used.(far sightedness)