Question

what is bifocals glasses and what is its uses

Answer 1

bifocal lenses are those which have both convex and concave lenses in it .. it is mainly for the elderly people

Answer 2

A bifocal lens is created with two different areas of vision correction, which are divided by a distinct line that sits horizontally across the lens. The top portion of the lens is used for distance, while the bottom portion of the lens is used for closer vision.