Final answer:
Tonometry is the procedure used to measure intraocular pressure, important for glaucoma detection and management, especially in individuals over 40.
Step-by-step explanation:
The simple, painless procedure used to measure intraocular pressure is known as tonometry. This test is crucial for diagnosing and managing conditions like glaucoma, a condition caused by the buildup of fluid pressure in the eye. There are different types of tonometry, but the most common noninvasive method involves using a puff of air to flatten the cornea and then measuring the force needed to indent the eye. Adults over 40 years of age should have their intraocular pressure tested regularly to detect and control excessive pressure, which can be harmful to the optic nerve and may lead to vision loss if left untreated.