What test is used to measure intraocular pressure for glaucoma diagnosis?

The tonometry test is the established method for measuring intraocular pressure, making it crucial for diagnosing glaucoma. Elevated intraocular pressure is a significant risk factor for glaucoma, a condition that can lead to optic nerve damage and potential vision loss. Tonometers, which can be classified into various types such as applanation and non-contact tonometers, assess the pressure within the eye by determining how much force is required to flatten a specific area of the cornea.

Other tests, while important in assessing overall eye health or detecting visual field loss associated with glaucoma, do not directly measure intraocular pressure. For instance, visual acuity tests assess how well a person can see at various distances but do not provide information about pressure within the eye. Fundoscopy allows examination of the back of the eye, including the optic nerve, but also does not measure intraocular pressure. Perimetry tests the visual field to identify any peripheral vision loss that may occur due to glaucoma but, again, does not evaluate intraocular pressure itself. The tonometry test remains the key diagnostic tool for managing glaucoma and ensuring timely intervention.