What causes the visual impairment known as astigmatism?

Multiple choice question for Introduction to Psychology. Select an option, then review the explanation below.

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An eyeball that is shorter than normal.An eyeball that is elongated beyond normal length.Irregular arrangement of sensory cells on the retina.A cornea or lens that has an irregular shape.A deficiency in the optic nerve function.

Explanation

Astigmatism occurs due to an irregularly shaped cornea or lens, which causes light to focus unevenly on the retina, resulting in blurred or distorted vision. It is not caused by the length of the eyeball or the distribution of retinal receptors.

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What causes the visual impairment known as astigmatism?

Explanation

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