Schiøtz tonometer
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| name = Schiøtz tonometer
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| purpose =measure intra ocular pressure
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Schiøtz tonometer is an indentation tonometer, used to measure the intraocular pressure (IOP) by measuring the depth produced on the surface of the cornea by a load of a known weight. The indentation of corneal surface is related to the IOP.
Parts
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.{{cite web|url=http://eyewiki.aao.org/IOP_and_Tonometry#Schiotz_Tonometer |title=IOP and Tonometry - EyeWiki |publisher=Eyewiki.aao.org |date= |accessdate=2013-10-02}}
Footplates have to be cool, dry and sterilized before use.{{cn|date=January 2022}}
Eponym
It was invented by the Norwegian ophthalmologist Hjalmar August Schiøtz, who presented it to the Norwegian Medical Society on 10 May 1905.{{cite web|url=http://www.college-optometrists.org/en/college/museyeum/online_exhibitions/optical_instruments/tonometers.cfm|title=Tonometers|first=Neil|last=Handley|publisher=|access-date=31 October 2013|archive-date=2 November 2013|archive-url=https://web.archive.org/web/20131102035525/http://www.college-optometrists.org/en/college/museyeum/online_exhibitions/optical_instruments/tonometers.cfm|url-status=dead}}{{cite journal|url=http://tidsskriftet.no/article/263673|title=Hjalmar Schiøtz og hans tonometer|journal=Tidsskrift for den Norske Legeforening|date=2001-02-10|last1=Ytteborg|first1=Jan}}
References
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External links
- [http://www.cehjournal.org/0953-6833/21/jceh_21_66_034.1.htm How to measure intraocular pressure: Schiötz tonometry]
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