Question

what are bifocal spectacles​

Answer 1

Answer:

Bifocals are eyeglasses with two distinct optical powers. Bifocals are commonly prescribed to people with presbyopia who also require a correction for myopia, hyperopia, and/or astigmatism.

Answer 2

Answer:

Bi focal lenses or glasses are type of

lenses which consist of both concave and

convex lenses. The upper portion consist

of a concave lens. It facilitates distant

vision. The lower part is a convex lens. It

facilitates near vision... Person suffering

from presbyopia uses this specific type of

lenses..

Hope it helps you

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