Question

9. 11. What are refractive defects of vision?
Why these defects arise ?​

Answer 1

Explanation:

myopia (nearsightedness), hyperopia (farsightedness), presbyopia (loss of near vision with age), and astigmatism.

Answer 2

Answer:

Refractive error means that the shape of your eye does not bend light correctly, resulting in a blurred image

reason it causes due to:

. Refractive errors can be caused by: Eyeball length (when the eyeball grows too long or too short) Problems with the shape of the cornea (the clear outer layer of the eye) Aging of the lens (an inner part of the eye that is normally clear and helps the eye focus)