|
Astigmatism (for a human eye) can be removed by using |
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|
a) |
Concave lens |
b) |
Convex lens |
c) |
Cylindrical lens |
d) |
Prismatic lens |
|
Astigmatism (for a human eye) can be removed by using |
|||||||
|
a) |
Concave lens |
b) |
Convex lens |
c) |
Cylindrical lens |
d) |
Prismatic lens |
|
(c) Cylindrical lens are used for removing astigmatism |