After testing the eyes of a child, the optician has prescribed the following lenses for his spectacles :
Left eye : 2.00 D Right eye : + 2.25 D
The child is suffering from the defect of vision called :
(a) short-sightedness (b) long-sightedness
(c) cataract (d) prsbyopia

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Solution

Answer : Option (b) long-sightedness

Explanation: Because the powers are given in positive. So lens is convex (converging lens). So for long-sightedness, convex lens is used for correction.

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After testing the eyes of a child, the optician has prescribed the following lenses for his spectacles : Left eye : 2.00 D Right eye : + 2.25 D The child is suffering from the defect of vision called : (a) short-sightedness (b) long-sightedness (c) cataract (d) prsbyopia

Answer : Option (b) long-sightedness Explanation: Because the powers are given in positive. So lens is convex (converging lens). So for long-sightedness, convex lens is used for correction.

After testing the eyes of a child, the optician has prescribed the following lenses for his spectacles :
Left eye : 2.00 D Right eye : + 2.25 D
The child is suffering from the defect of vision called :
(a) short-sightedness (b) long-sightedness
(c) cataract (d) prsbyopia

Answer : Option (b) long-sightedness

Explanation: Because the powers are given in positive. So lens is convex (converging lens). So for long-sightedness, convex lens is used for correction.