Certified Paraoptometric Practice Test 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

What is the term used for the measurement from edge to edge of the lens at the widest point called?

Base curve radius

Contact angle

Overall diameter

The base curve radius refers to the curvature of the lens, while the contact angle is the angle between the lens and the surface it is placed on. Segment height is a measurement used for bifocal or multifocal lenses. Overall diameter is the term used to measure the size of the lens from edge to edge, including the optical or functional area, and is the most accurate term for describing the size of a lens.

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Segment height

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