Q. Astigmatism occurs when the cornea does not have a truly spherical shape. The defect can be cured by:
A. Concave lens
B. Cylindrical shape
C. Convex lens
D. Plane convex lens
Answer: Cylindrical shape
A. Concave lens
B. Cylindrical shape
C. Convex lens
D. Plane convex lens
Answer: Cylindrical shape