Question
Question: A person suffering from 'presbyopia' (myopia and hyper metropia both defects) should use...
A person suffering from 'presbyopia' (myopia and hyper metropia both defects) should use
A
A concave lens
B
A convex lens
C
A bifocal lens whose lower portion is convex
D
A bifocal lens whose upper portion is convex
Answer
A bifocal lens whose lower portion is convex
Explanation
Solution
A bifocal lens consist of both convex or concave lenses with lower part is convex.