Question

What are different defects of vision how it can be corrected?

Answer 1

Answer:

some vision defects are myopia, hypermetropia, presbyopia.

Explanation:

we can correct myopia by using concave lens and hypermetropia by using convex lens and presbyopia by using bi focal lens i.e, upper part is concave lens and lower part is convex lens

Answer 2

Answer:MYOPIA (correction using concave lens of suitable power), HYPERMETROPIA (correction using convex lens of suitable power), PRESBYOPIA (correction using bifocal lens of suitable power), ASTIGMATISM (correction using cylindrical lens of suitable power).....