what is bifocal lens
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A bifocal lens consists of both-
A convex lens (to correct hypermetropia)
And concave lens (to correct myopia)
The upper portion consists of a concave lens as it facilitates distint vision.
And the lower part consists of convex lens as to facilitate near vision.
A convex lens (to correct hypermetropia)
And concave lens (to correct myopia)
The upper portion consists of a concave lens as it facilitates distint vision.
And the lower part consists of convex lens as to facilitate near vision.
rajan24:
thanks for answer..
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Answer:
A biofocal lens is a lens of which the upper part is a concave lens to correct myopia and the lower part is a convex lens to correct hypermetropia.
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