Certified Paraoptometric Practice Test

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Prepare for the Certified Paraoptometric Test! Study using flashcards, multiple choice questions, and detailed explanations. Get ready for your exam and boost your optometric skills!

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What is the primary measurement on a contact lens prescription that indicates how steep or flat the back surface of the lens is?

  1. Base curve radius

  2. Peripheral curves

  3. Segment height

  4. Trifocal addition

The correct answer is: Base curve radius

The primary measurement on a contact lens prescription that indicates how steep or flat the back surface of the lens is, is called the base curve radius. This measurement is important because it determines how well the lens fits the shape of the eye. It is important for the lens to have the correct base curve radius in order to properly fit the eye and provide clear vision. The other options in the list, such as peripheral curves, segment height, and trifocal addition, are all important factors in a contact lens prescription but they do not specifically relate to the steepness or flatness of the back surface of the lens.

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