Certified Paraoptometric (CPO) Practice Exam 2025

What is a primary function of tonometry in eye care?

1. To measure visual acuity

2. To assess intraocular pressure

3. To evaluate pupil response

4. To check for cataract formation

The correct answer is: To assess intraocular pressure

The primary function of tonometry in eye care is to assess intraocular pressure. This procedure is crucial because it helps in the diagnosis and management of glaucoma, a condition characterized by elevated intraocular pressure that can lead to optic nerve damage and vision loss. Maintaining the health of the eye involves monitoring this pressure, as fluctuations can indicate potential problems. Visual acuity measurement focuses on determining the sharpness or clarity of vision but does not provide any information about intraocular pressure. Evaluating pupil response assesses the functioning of the optic nerve and the retina but is also unrelated to tonometry. Checking for cataract formation involves analyzing the lens of the eye but does not pertain to measuring pressure within the eye. Thus, assessing intraocular pressure is the essential role of tonometry in eye care.