A Postgraduate's Guide To Tonometry
Tonometry is the procedure for the measurement of intraocular pressure. It is the most important risk factor for the development and progression of glaucoma. It is the only factor that can be treated and modified in the management of glaucoma. Therefore, the need for accurate and reproducible measurement of IOP is of utmost importance. Clinical measurement of IOP has undergone several technical advances from the initial digital tension measurements, through indentation tonometry, to applanation tonometry and non-contact tonometry. The current gold standard for the measurement of IOP is the Goldmann applanation tonometer. Tonometer in which the IOP is negligibly raised during measurements, for example less than 5%, are termed low-displacement tonometer. Tonometer that displace a large volume of fluid and consequently raise IOP significantly are termed high-displacement tonometer. Classification and Types of Tonometers are shown in Flowcharts 1 & 2. Classification of Tonometer 1 Classifi
Dr. Vidya Chelerkar · Dr. Mrunall Borrse