Question

8. What do you mean by astigmatism? What causes astigmatism and how
corrected ?
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Answer 1

Answer:

1. Astigmatism is a common vision problem caused by an error in the shape of the cornea.
2. With astigmatism, the lens of the eye or the cornea, which is the front surface of the eye, has an irregular curve.
3. This can change the way light passes, or refracts, to your retina.
4. This causes blurry, fuzzy, or distorted vision.

I HOPE IT HELPS.

Explanation:

Answer 2

Astigmatism: The defect by which the person is not able to differentiate horizontal and vertical position, is called astigmatism.

Causes of Astigmatism:

Astigmatism is caused by an unevenly shaped cornea. The uneven shape causes the rays of light to focus on two points on the retina, causing distortion and blurring of images.

Correction of astigmatism:

This defect of vision can be rectified by using cylindrical lenses.