Certified Paraoptometric (CPO) Practice Exam 2025

Which test is specifically used to measure intraocular pressure?

1. Optometry

2. Tonometry

3. Slit-lamp examination

4. Retinoscopy

The correct answer is: Tonometry

The correct answer is tonometry, as this test is specifically designed to measure intraocular pressure (IOP) within the eye. Monitoring IOP is vital for diagnosing and managing various eye conditions, particularly glaucoma, as elevated pressure can lead to optic nerve damage and vision loss. Tonometry can be performed using several different methods, including the non-contact (air puff) method or contact methods such as Goldmann applanation tonometry. Other options listed, while relevant to eye examinations, serve different purposes. Optometry refers to the practice of examining and treating the eyes, rather than a specific test. A slit-lamp examination is used to assess the anterior segment of the eye, allowing for the evaluation of structures such as the cornea, iris, and lens, but does not measure IOP. Retinoscopy is a technique used to evaluate refractive error by observing the reflex from the retina, again not related to the measurement of intraocular pressure. Therefore, tonometry is the test specifically utilized for assessing IOP levels.