Eyes: A man is nearsighted and cannot see things clearly beyond 110 cm from his eyes. What is the focal length of the contact lenses that will enable him to see very distant objects clearly?

Question

Quizplus · Accepted Answer

The focal length of the lens needed for a nearsighted person is negative and equal to the far point distance. Since the man cannot see beyond 110 cm, the focal length of the contact lenses should be -110 cm to correct his vision for distant objects.

Eyes: a Man Is Nearsighted and Cannot See Things Clearly