Question

Which of the following is true about vision defects and their corrective lenses?

A. Nearsighted people need converging lenses to correct their vision defect.
B. Farsighted people need diverging lenses to correct their vision defect.
C. Nearsighted people need diverging lenses to correct their vision defect.
D. Farsighted people need cylindrical lenses to correct their vision defect.

Answer 1

Nearsightedness — The condition where a person can see near objects clearly but distant objects are blurry. In this type of vision defect the image formed by eye lens is in front of the retina. The lenses used to correct nearsightedness are concave in shape that is diverging lens So that image will be formed on the retina. In other words, the lenses are thinnest at the center and thicker at the edge.

Farsightedness- In this type of vision defect the person can see distant object cleary but can not see nearby objects. The image formed by eyelens is behind the retina. To overcome this defect converging lenses should be used that is convex lens so that light rays will converge and image formed by lens is on the retina.

Correct option is - C) Nearsighted people need diverging lenses to correct their vision defect.

Thank you?