Certified Paraoptometric (CPO) Practice Exam 2025

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Prepare for the Certified Paraoptometric Exam with our comprehensive quiz featuring multiple-choice questions. Each question is accompanied by hints and explanations, helping you build your knowledge and confidence. Get ready to excel in your career!

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What is the name of the instrument used to measure the curvature of the cornea?

Keratometer
Phoropter
Tonometer
Retinoscope

The correct answer is: Keratometer

The instrument used to measure the curvature of the cornea is called a keratometer. This device is specifically designed to assess the corneal surface, which is crucial for determining the shape and steepness of the cornea. Accurate measurements are essential in fitting contact lenses and pre-operative assessments for procedures like LASIK surgery. The other instruments mentioned serve different purposes in the field of optometry. A phoropter is used for refraction to determine an individual's eyeglass prescription. A tonometer measures intraocular pressure to help diagnose conditions such as glaucoma. A retinoscope is utilized to evaluate the refractive status of the eye by projecting light into the eye and observing the reflection. Each of these instruments is valuable in optometric practice, but only the keratometer is designed specifically for measuring corneal curvature, making it the correct choice for this question.