Long-sight defect could be corrected by using __________ lens?
A. concave
B. Convex
C. diverging
D. none of these
ALSO CHECK: Short-sight defect could be corrected by a _____________ lens?
Long-sight defect could be corrected by using __________ lens?
A. concave
B. Convex
C. diverging
D. none of these
ALSO CHECK: Short-sight defect could be corrected by a _____________ lens?