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Q. |
Which one of the following is used to remove Astigmatism for a human eye? |
A. | Concave lens |
B. | Convex lens |
C. | Cylindrical lens |
D. | Prismatic lens |
Answer» C. Cylindrical lens | |
Explanation: In Astigmatism, eye cannot see objects in two orthogonal directions clearly simultaneously. This abnormality is removed by using cylindrical lens. |
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