What is the primary purpose of a tonometer?

The primary purpose of a tonometer is to measure intraocular pressure. This device is essential in the assessment of eye health, particularly in the diagnosis and management of glaucoma. Increased intraocular pressure can lead to optic nerve damage and vision loss, making regular measurements crucial for individuals at risk for this condition. Tonometers come in various types, including applanation, indentation, and non-contact tonometers, each serving the same essential function of assessing pressure within the eye to ensure it remains within normal limits.

While measuring visual acuity, evaluating pupillary response, and examining the retina are important aspects of a comprehensive eye examination, they serve different purposes and do not directly relate to the measurement of intraocular pressure. Therefore, the tonometer specifically focuses on assessing pressure rather than these other eye-related evaluations.