Certified Paraoptometric (CPO) Practice Exam 2025

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What is the primary purpose of using the Tonopen?

To diagnose cataracts
To measure intraocular pressure
To prescribe corrective lenses
To perform retinal examinations

The correct answer is: To measure intraocular pressure

The primary purpose of using the Tonopen is to measure intraocular pressure. Accurate measurement of intraocular pressure is crucial in diagnosing and managing conditions such as glaucoma. The Tonopen is a handheld tonometer that provides a quick and effective way to assess eye pressure, making it an essential tool in routine eye examinations and monitoring of patients at risk for developing ocular hypertension or glaucoma. Using the Tonopen helps eye care professionals determine if further evaluation or treatment is needed to protect the patient's vision. Its ability to provide reliable intraocular pressure readings plays a vital role in managing eye health.