Certified Paraoptometric (CPO) Practice Exam 2025

What is the primary purpose of tonometry in eye examinations?

1. To measure the curvature of the cornea

2. To assess the clarity of the lens

3. To measure the intraocular pressure

4. To evaluate peripheral vision

The correct answer is: To measure the intraocular pressure

The primary purpose of tonometry in eye examinations is indeed to measure the intraocular pressure. This measurement is crucial for diagnosing and monitoring conditions like glaucoma, which can lead to vision loss if not adequately managed. By assessing the pressure within the eye, healthcare professionals can determine if it is within a normal range or if there are signs of potential ocular disease. This screening helps in early detection and intervention, which is essential for preserving vision health. The other options relate to different aspects of eye health. Measuring the curvature of the cornea pertains to assessing conditions like astigmatism, while evaluating the clarity of the lens relates to cataract assessments. Assessing peripheral vision focuses on visual field testing, which is essential for detecting certain eye and neurological conditions. However, these actions do not address the primary aim of tonometry, which is specifically centered on intraocular pressure management.