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ABO NOCE Basic Opticianry

Category - Ophthalmic Optics

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A Fresnel prism is

The name for the prism ground into lenses
The name for the plastic sheet of press-on prisms that can be added to existing lenses
None of the above

Explanation

Answer: B - A Fresnel prism is the name for the plastic sheet of press-on prisms that can be added to existing lenses.

In many circumstances for low vision patients, a Fresnel prism continues to be used when grinding prism into a lens will not work for that patient's circumstances. This press-on prism can highly reduce the thickness of a high powered prism and can be placed anywhere on the patient's lens as needed.

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ABO NOCE Basic Opticianry

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ABO NOCE Basic Opticianry

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