Question

Which part of bi-focal lens should a person use to read? And why?

• A. Lower part , since it facilitates distinct vision
• B. Upper part , since it facilitates near vision.
• C. Lower part, since it facilitates near vision.
• D. Upper part , since it facilitates distant vision.

Answer 1

The correct option is C

Lower part, since it facilitates near vision.

To read, the person should use lower part i.e. convex lens, since it facilitates near vision.