Indentation tonometry is a method used to measure the pressure inside the eye, known as intraocular pressure (IOP). This technique involves applying a small, controlled force to the surface of the eye and measuring how much the eye indents. The amount of indentation correlates with the pressure inside the eye, helping to assess conditions like glaucoma. The procedure is typically quick and non-invasive, making it a common choice in eye examinations. By monitoring IOP, eye care professionals can detect potential issues early and recommend appropriate treatments to maintain eye health.