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The Maklakoff tonometer was an early example of this method, while the Goldmann tonometer is the most widely used version in current practice. [3] Because the probe makes contact with the cornea, a topical anesthetic , such as proxymetacaine , is introduced on to the surface of the eye in the form of an eye drop .
Goldmann Applanation Tonometer attached with Slit lamp biomicroscope Goldmann Applanation Tonometer is an instrument that is based on Imbert-Fick law . It is considered to be the gold standard instrument for measurement of Intraocular pressure (IOP).
The Schiotz tonometer consists of a curved footplate which is placed on the cornea of a supine patient. A weighted plunger attached to the footplate sinks into the cornea. A scale then gives a reading depending on how much the plunger sinks into the cornea, and a conversion table converts the scale reading into IOP measured in mmHg.
Gastric tonometry has been introduced as a novel method of monitoring tissue perfusion in critically ill patients. Tonometry is based on the principle that at equilibrium the partial pressure of a diffusible gas such as CO 2 is the same in both the wall and lumen of a viscus.
Elwin Marg (March 23, 1918 – July 15, 2010) was an American optometrist and neuroscientist at the University of California at Berkeley.He was the first to receive a PhD from UC Berkeley School of Optometry.
AppleCare+ is Apple's brand name for extended warranty and technical support plans for their devices. AppleCare+ extends the devices' one-year limited warranty and the ninety days of technical support (which is known as basic AppleCare).
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