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Which of the following defects can be rectified by using cylindrical lenses? |
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(a) |
Myopia |
(b) |
Presbyopia |
(c) |
Astigmatism |
(d) |
Hypermetropia |
|
Which of the following defects can be rectified by using cylindrical lenses? |
|||||||
|
(a) |
Myopia |
(b) |
Presbyopia |
(c) |
Astigmatism |
(d) |
Hypermetropia |