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Ophthalmic Assistant

Category - Lensometry and Spectacle Skills

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Which of the following is a unit of measurement for the optical power of a lens?

Cylinder (cyl)
Sphere (sph)
Diopter
Axis

Explanation

Answer: C - Diopter

The diopter is a unit of measurement for the optical power of a lens. The higher the number of diopters, the stronger the lens will be. Lenses can be in positive (plus) or negative (minus) diopters.

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