In bifocal lens the upper and lower portion contains lenses
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Where do we see concave lens convex lens in bifocal lens lenses?
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Where do we see concave lens convex lens in bifocal lens lenses?
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In bifocal lens ,the upper part of lens consist concave (to correct myopia) and lower convex (to correct hypermetropia). concave is used in upper portion of distant vision and convex in lower vision.
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