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Ophthalmic Assistant

Category - Supplemental Skills

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The normal thickness of the central cornea is about

700 nm.
540 nm.
200 nm.
150 nm.

Explanation

Answer: B - 540 nm.

The normal thickness of the central cornea is about 540 nm-or about half a millimeter. Those with thinner corneas are at a higher risk for glaucoma.

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