Question

What type of spectacles should be worn by a person having the defects of myopia as well as hypermetropia? How does it help?

Answer 1

A person having the defects of myopia as well as hypermetropia should wear spectacles with bifocal lenses, in which the upper part consists of a concave lens and the lower part consists of a convex lens. The upper part corrects myopia, and the lower part corrects hypermetropia.