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Ophthalmic Assistant

Category - Keratometry, Tonometry, and Refractometry

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The best correction a patient with astigmatism can obtain without a cylinder is known as

irregular astigmatism.
cylinder equivalent.
spherical equivalent.
subjective refraction.

Explanation

Answer: C - spherical equivalent.

The best correction a patient with astigmatism can obtain without a cylinder is known as the spherical equivalent. This is calculated by adding half of the cylinder power to the spherical power.

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