Question

what is the cause of presbyopia and which lens is used for correct the defect​

Answer 1

Answer:

The upper part of this bifocal lens is made up of the concave lens and lower part of this lens is made up of convex lens. Hence, the person with presbyopia can see near as well as distant objects clearly. Therefore, the lens used to correct the presbyopia of the person is bifocal.

Answer 2

Answer:

The upper part of this bifocal lens is made up of the concave lens and lower part of this lens is made up of convex lens. Hence, the person with presbyopia can see near as well as distant objects clearly. Therefore, the lens used to correct the presbyopia of the person is bifocal.

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