The rear point of a person is 50 cm and the far point is0.5 m.The spectacles required for reading purpose and far seeing distant are
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Bifocal Lens with both diverging and converging facilities
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The spectacles required for reading purpose are convex lens.
The spectacles required for seeing distant objects are concave lens.
If the person has both far point and near point disturbed, then bifocal lens can be used which have concave lens on the above and convex lens on the below side of the spectacles.
The spectacles required for seeing distant objects are concave lens.
If the person has both far point and near point disturbed, then bifocal lens can be used which have concave lens on the above and convex lens on the below side of the spectacles.
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