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2015-04-06T04:52:16+05:30

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The presbyopia is saw in the people who cant able to see bth near and far objects clearly. hence we used  both convex on concave lens to clear this problem.
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:) ty deariee :)
nice
ty bestiee :)
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2015-04-06T05:03:39+05:30

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Bifocal lens is used in it in that concave and convex both lenses are there
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