A nearsighted person cannot see objects clearly beyond 70 cm (the far point).If the patient has no astigmatism and contact lenses are prescribed,what is the power of the lens required to correct the patient's vision?
A)-0.7 diopters
B)-1.4 diopters
C)-2.9 diopters
D)-7.0 diopters

Question

Quizplus · Accepted Answer

The power of the lens required is calculated using the formula P = 1/f, where f is the focal length in meters. Since the far point is 70 cm, f = -0.7 m (negative because it's a virtual image for nearsightedness). Thus, P = 1/(-0.7) = -1.4 diopters.

A Nearsighted Person Cannot See Objects Clearly Beyond 70 Cm