Your left eye can focus on objects a great distance away but cannot focus on objects that are closer than 125 cm to it.The power of the lens in diopters that you need for normal near vision (25 cm)is
A)+0.8 diopters
B)+3.2 diopters
C)+4.0 diopters
D)-4.0 diopters
E)None of these is correct.

Question

Quizplus · Accepted Answer

To find the lens power needed, use the lens formula: 1/f = 1/v - 1/u. For normal near vision, v = 25 cm (0.25 m) and u = 125 cm (1.25 m). Calculate the power: 1/f = 1/0.25 - 1/1.25 = 4 - 0.8 = 3.2 diopters.

Your Left Eye Can Focus on Objects a Great Distance