The near point of a farsighted person is 100 cm. She places reading glasses close to her eye, and with them she can comfortably read a newspaper at a distance of 25 cm. What lens power is required?
A) -2.5 D
B) +2.5 D
C) +3.0 D
D) -2.0 D
E) +3.2 D

Question

Quizplus · Accepted Answer

The lens power required is given by:P = 1/f = 1/(25 cm) = +4 DSince the person is farsighted, the lens power required is positive. Therefore, the correct answer is +3.0 D.

The near Point of a Farsighted Person Is 100 Cm