Cylindrical glass is used for:: (A) Presbyopia, (B) High myopia, (C) Hypermetropia, (D) Astigmatism
Answer is D. Ans. (d) AstigmatismRef: A.K. Khurana 6th ed. 142-43, Harrison's 19th ed./ 195* Astigmatism is a type of refractive error which arises due to irregular curvature of cornea.* Correction of astigmatism is done by using cylindrical lens.