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ABO NOCE Basic Opticianry

Category - Ophthalmic Optics

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What is prism by decentration?

Cutting off the surface of the lens when power is not sufficient
Cutting off the surface of the lens when the power is sufficient
None of the above

Explanation

Answer: B - Prism by decentration is created by cutting off the surface of the lens when the power is sufficient.

Prism decentration can only occur when the lens power is sufficient before adding prism to be able to induce the correct amount of prism needed for the prescription.

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