The bifocal lens used in the correction of presbyopia has a lens on upper side and a lens on lower side.

concave

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cylindrical

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bifocal

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convex

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Solution

The correct option is D convex
The upper part of a bifocal lens has a concave lens (diverging lens) so that a person can see distant objects from the upper part and the lower part has a convex lens (converging lens) so that the person can look through it to see near objects, i.e., for reading. The lenses are placed in this order for the convenience of the users.

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Similar questions

Rewrite the following table so as to match second and third column with first column

A bifocal lens is used for the correction of ____. The upper part of the bifocal lens is a ____ lens and the lower part is ____.

What is presbyopia? Which part of the bifocal lens contains the concave and convex lens?

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