RRB Technician 2014 Ques 31
Question: A person suffering from presbiopia should use
Options:
A) a concave lens
B) a bifocal lens of which lower portion is convex
C) a bifocal lens of which upper portion is convex
D) a convex lens
Show Answer
Answer:
Correct Answer: B
Solution:
- A bifocal lens, in which lower portion is convex to provide correction to hyper- metropia and upper portion concave to provide remedy for myopia is used for presbiopia.
BETA
