Source:http://linkedlifedata.com/resource/umls/id/C0179524
SPN: A tonometer and accessories is a manual device intended to measure intraocular pressure by applying a known force on the globe of the eye and measuring the amount of indentation produced (Schiotz type) or to measure intraocular tension by applanation (applying a small flat disk to the cornea). Accessories for the device may include a tonometer calibrator or a tonograph recording system. The device is intended for use in the diagnosis of glaucoma.,UMD: Calibrators designed to test the accuracy of ophthalmic tonometers. These calibrators usually include measuring (e.g., force, area) instruments with physical characteristics and measuring ranges appropriate to assess the type of tonometer (e.g., indentation, applanation, noncontact) under test. Calibrators may be supplied as accessories to ophthalmic tonometers; some tonometers include self-calibration capabilities. Ophthalmic tonometer calibrators are used for periodic verification of tonometers; new types of tonometers are frequently calibrated in laborat