Question

A person is suffering from both myopia and hypermetropia.

1. What kind of lenses can correct this defect?
2. How are these lenses prepared?

Answer 1

1. The type of lens required by such person to improve the vision is bifocal lens.
2. Convex and concave lenses make into a bifocal lens. Hypermetropia (farsightedness) is corrected with a convex lens in a bifocal lens, whereas myopia (shortsightedness) is corrected with a concave lens.