Question

why are the common eye defects? Give their causes and corrective measures​

Answer 1

Answer:

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Explanation:

Nearsightedness, cataracts, keratoconus, and a lack of vitamin A all cause a type of night blindness that doctors can fix. Some people are born with this problem, or it might develop from a degenerative disease involving the retina, and that usually can't be treated.

Answer 2

Explanation:

Nearsightedness, cataracts, keratoconus, and a lack of vitamin A all cause a type of night blindness that doctors can fix. Some people are born with this problem, or it might develop from a degenerative disease involving the retina, and that usually can't be treated.