Question

name the type of lens used to correct the eye defect

Answer 1

which is your eye deflect

Answer 2

if one having the defect of Myopia (Nearsightedness), who can't see distant object clearly, Then it can be corrected using spectacle with concave lens. If one having defect of Farsightedness, who can't see nearby object clearly, then it can be corrected using spectacle with convex lens. For presbyopia, the spectacle having upper part of concave lense while the lower part of convex lens is usef