A nearsighted person has a far point that is 4.2 m from his eyes. What focal length lenses must he use in his contact lenses to allow him to focus on distant objects?
A) -4.2 m
B) 4.2 m
C) -5.2 m
D) 5.2 m
E) 4.8 m

Question

Quizplus · Accepted Answer

A nearsighted person needs lenses with a negative focal length to correct their vision. The focal length of the lens should be equal to the negative of the far point distance, which is -4.2 m.

A Nearsighted Person Has a Far Point That Is 4