Question

A person is suffering from the defect astigmatism it's main reason is​

Answer 1

Answer:

Astigmatism:

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

Explanation:

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Answer 2

Explanation:

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Reason:

the cornea is not spherical

We know that when cornea of eye is not spherical, then human eye is suffered with astigmatism