Engineering:Schiøtz tonometer
| Schiøtz tonometer | |
|---|---|
| Medical diagnostics | |
_-_Skagit_County_Historical_Museum.jpg) | |
| Purpose | measure intra ocular pressure |
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.[1]
Footplates have to be cool, dry and sterilized before use.[citation needed]
Eponym
It was invented by the Norwegian ophthalmologist Hjalmar August Schiøtz, who presented it to the Norwegian Medical Society on 10 May 1905.[2][3]
References
- ↑ "IOP and Tonometry - EyeWiki". Eyewiki.aao.org. http://eyewiki.aao.org/IOP_and_Tonometry#Schiotz_Tonometer. Retrieved 2013-10-02.
- ↑ Handley, Neil. "Tonometers". http://www.college-optometrists.org/en/college/museyeum/online_exhibitions/optical_instruments/tonometers.cfm.
- ↑ Ytteborg, Jan (2001-02-10). "Hjalmar Schiøtz og hans tonometer". Tidsskrift for den Norske Legeforening. http://tidsskriftet.no/article/263673.
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