A person is suffering from both myobia and hypermetropia what type of lens should be used to correct his defect ? Describe the lens used to be used
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(i) Bifocal lenses can correct this defect. (ii) These lenses are prepared by combining both the lenses in spectacles, such that its upper part of the spectacles consists of a concave lens (to correct myopia) and the lower part consists of a convex lens (to correct hypermetropia).
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