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!

Practice this question and more.

What is the designation for the placement of the cylinder within the lens?

Segmentation
Alignment
Orientation
Axis

The correct answer is: Axis

The correct answer is D. Axis. In eyeglass prescriptions, the cylinder is the component that corrects astigmatism. The axis indicates the placement of this cylinder within the lens to ensure that it is oriented correctly to address the astigmatism present in the eye. Properly identifying and marking the axis on the lens is crucial for the prescription to be accurate and provide the intended vision correction. The other options are incorrect: - Segmentation refers to dividing an image or object into segments. - Alignment generally refers to the positioning or arrangement of components to be in a straight line or correct relative positions. - Orientation refers to the direction in which something is positioned or aligned.