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Ophthalmic Technician

Category - Lensometry and Spectacle Skills

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Regardless of the power of the prismatic correction, what is the thickness of the Fresnel prism?

0.01 mm
0.1mm
1.0mm
10mm

Explanation

Answer: C - Because the Fresnel prisms are as thin as 1.0mm, they can be easily used directly over the spectacles.

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