Final answer:
Tonometry is the method used to measure the intraocular pressure of the eyes, which is essential for diagnosing and managing conditions like glaucoma. A tonometer is the instrument used in this procedure.
Step-by-step explanation:
The medical instrument used to examine the pressure of the eyes is known as tonometry. Tonometry is a diagnostic procedure that measures the intraocular pressure (IOP) within the eye, which is crucial for the diagnosis and management of glaucoma. An increase in IOP can indicate glaucoma, a condition that may lead to vision loss if not properly managed. The device used for this measurement is called a tonometer. The process often involves numbing the eye with anesthetic drops and then applying pressure to the eye either through a small probe or a puff of air to measure the eye's response to the applied force. If the intraocular pressure is high, the eye may deform less and rebound more than normal, which can be an indication of glaucoma.