Question

Different kinds of lenses are used in eyeglasses to help people with eye conditions. Farsightedness is an eye condition in which distant objects appear clear but close objects appear blurry. Nearsightedness is an eye condition in which close objects appear clear but distant objects appear blurry. Which best describes the type of lens that would help someone with one of these eye conditions?

Answer 1

The correct answer would be

• Concave lens for nearsightedness
• Convex lens for farsightedness

Nearsightedness or myopia is a condition in which a person can see the nearby objects clearly but is unable to see the objects present at a farther distance clearly.

It is usually caused due to elongation of the eyeball or when the lens becomes too curved.

It can be corrected by using a concave or diverging lens of appropriate power.

Farsightedness or hyperopia is a condition in which a person can see the distant objects clearly but is unable to see the nearby objects distance clearly.

It is usually caused due to shortening of the eyeball or when the lens loses its curvature.

It can be corrected by using a convex or converging lens of appropriate power.