A nearsighted man cannot see objects clearly beyond 20 cm from his eyes. How close must he stand to a mirror in order to see what he is doing when he shaves?
What is the power of the eye when viewing an object 50.0 cm away? The lens-to-retina distance is 2.00 cm.
The power of a physician’s eyes is 53.0 D while examining a patient. How far from her eyes is the object that is being examined? The lens-to-retina distance is 2.00 cm.