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ABO NOCE Basic Opticianry

Category - Ophthalmic Optics

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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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