Question

What powered lens should be used for the correction of a myopic eye whose far point is $85cm$?

• A. -1.17 D
• B. +1.63 D
• C. +2.56 D
• D. -1.44 D

Answer 1

Answer: (A)

Distance of far point $x=85cm$
As $f=-x=-50cm=-0.85m$
$P=-\frac{1}{0.85}=-1.17$