Abstract: Intraocular pressure(IOP) has a fluctuation and circadian rhythm. Twenty-four-hour IOP is significant for the diagnosis, treatment and therapeutic assessment of glaucoma. In the clinic 24-hour IOP measurement via multiple IOP measurements by tonometers, fails to capture the true information of dynamic IOP. Implant tonometry consists of simple implant tonometry and compound implant tonometry, with a pressure sensor directly implanted in the eye to realize long-term or permanent IOP monitoring. Contact lens tonometry could monitor 24-hour IOP continuously by means of contact lenses inserted with a sensor that can detect corneal deformation related to IOP changes. Continuous tonometry shows a bright application prospect in studying the changes of IOP, and assisting in the diagnosis and therapeutic decision-making of glaucoma. (Int Rev Ophthalmol, 2021, 45: 465-470)

Key words: glaucoma, intraocular pressure, intraocular pressure monitoring, sensor