Short-sightedness can be corrected by using ___________?
A. Convex lens
B. Concave lens
C. Convex-concave lens
D. Concave-convex lens
Short-sightedness can be corrected by using ___________?
A. Convex lens
B. Concave lens
C. Convex-concave lens
D. Concave-convex lens