Draw a labelled diagram of the two lens used for correction of presbyopia
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Presbyopia is corrected using convex lens in spectacles. it an also happen that a person with this defect cannot see far objects also. So presbyopia has both defects myopia and hypermetropia.
An eye that suffers from myopia as well as from hypermetropia is said to suffer from presbyopia. A person with this defect cannot see objects distinctly placed at any distance from him. To correct this defect, a person is prescribed bifocal lens that has both types of lenses convex and concave.
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Answer:
it is a bifocal lens........ it is like a big concave lens with a convex lens in the bottom part of it
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