Question

Which eye defect is removed using bifocal lens?

• A. Myopia
• B. Hypermetropia
• C. Presbyopia
• D. Astigmatism

Answer 1

The correct option is C

Presbyopia

Explanation for correct option:

1. Presbyopia eye defect is removed using a bifocal lens.
2. Bifocals are glasses that have both a correction for your distance vision on the top of the lens and a correction to help you read on the bottom.
3. The gradual loss of your eyes' capacity to focus on adjacent things is known as presbyopia. It's a normal part of growing older. It can be corrected using a bifocal lens
4. The figure below shows how presbyopia is corrected using a bifocal lens
   

Explanation for incorrect Option:

option A

1. Nearsightedness (myopia) is a vision problem in which items close to you are plainly seen but objects further away are blurry.
2. A concave lens is used to correct short-sightedness (myopia)

option B

1. In Hypermetropia visual images come to a focus behind the retina of the eye, and eyesight is better for distant objects than for close items.
2. convex lens is used for hypermetropia.

option D

1. Astigmatism is a common and treatable defect in the curvature of the eye that produces blurred distant and close vision. Hence doesn't allow formation of point images.
2. cylindrical lenses are used to correct astigmatism

Thus, presbyopia eye defect is removed using a bifocal lens.

Hence, the correct option is (C).