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What is For tonometry is : and explain in detail?
Tonometry is the method of measuring intraocular pressure using calibrated instruments. The normal range is 10 to 21 mm Hg.Schiotz tonometry, a drop of surface anaesthetic solution like 4%xylocaine is used. Ref :Greenberg R.D., Daniel K.J. (2011). Chapter 31. Eye Emergencies. In R.L. Humphries, C. Stone (Eds), CURRENT Diagnosis & Treatment Emergency Medicine, 7e.