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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. [citation needed]
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).
Armand Imbert (1850-1922) and Adolf Fick (1829-1901) both demonstrated, independently of each other, that in ocular tonometry the tension of the wall can be neutralized when the application of the tonometer produces a flat surface instead of a convex one, and the reading of the tonometer (P) then equals (T) the IOP," whence all forces cancel each other.
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.
ICARE Institute of Medical Sciences & Research, established in 2011, is a private medical college located in Haldia, West Bengal.This college offers the Bachelor of Medicine and Surgery (MBBS) courses and postgraduate MD courses in Pathology, Pharmacology, Microbiology, Biochemistry.
He made a "tonometer" (German: Tonmesser) from 56 tuning forks as an instrument for accurately measuring pitch by counting beating, described in 1834. [ 2 ] [ 3 ] [ 4 ] "A wooden board...together with a small wooden mallet with which the forks are to be struck, and a good metronome , constitute Scheibler's tuning apparatus."
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