Certified Paraoptometric Practice Test

What is tonometry?

1. The measurement of visual acuity

2. The measurement of intraocular pressure

3. The measurement of eye alignment

4. The measurement of refractive errors

The correct answer is: The measurement of intraocular pressure

Tonometry refers to the measurement of intraocular pressure (IOP) within the eye. This is a crucial aspect of eye examinations as it helps in the detection and management of glaucoma, a condition characterized by increased eye pressure that can lead to optic nerve damage and permanent vision loss if left untreated. The procedure typically involves devices called tonometers, which assess how much pressure is required to flatten a small part of the cornea. Maintaining normal intraocular pressure is vital for the overall health of the eye, and identifying abnormal levels can facilitate early intervention. Visual acuity measures clarity or sharpness of vision, eye alignment evaluates how well both eyes work together, and refractive error assessments determine how well the eye focuses light, none of which relate to intraocular pressure measurement. Therefore, tonometry specifically focuses on evaluating the pressure within the eye, making it a key diagnostic tool in optometric practice.