American Board of Opticianry (ABO) Practice Test 2025 - Free ABO Practice Questions and Study Guide

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Which instrument is used to measure intraocular pressure?

Phoropter

Slit Lamp

Tonometer

A tonometer is used specifically to measure intraocular pressure, while the other options are used for other purposes. A phoropter is a device used in eye exams to determine the appropriate lens prescription for glasses or contacts. A slit lamp is a tool used to examine the structures of the eye, such as the cornea, iris, and lens. A keratometer is used to measure the curvature of the cornea, which is helpful in fitting contact lenses. However, none of these instruments are designed to measure intraocular pressure, making them incorrect options.

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Keratometer

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