A person of age 40 is fitted with bifocals with a strength

Last updated: 7/10/2022

A person of age 40 is fitted with bifocals with a strength of +1 diopter more than the correction for distance vision. What are the closest and farthest distances of focus without the bifocal lens and with it? By the time the person is age 50, what are they with and without the same lens?