A) Convex lens
B) Concave lens
C) Cylindrical lens
D) Toric lens
Correct Answer: B
Solution :
In myopia, \[u=\infty ,\]v=d=distance of far point By \[\frac{1}{f}=\frac{1}{v}-\frac{1}{u},\] we get \[f=-d\] Since f is negative, hence the lens used is concave.You need to login to perform this action.
You will be redirected in
3 sec