Schiøtz tonometer
| Schiøtz tonometer | |
|---|---|
_-_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
[edit]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
[edit]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
[edit]- ^ "IOP and Tonometry - EyeWiki". Eyewiki.aao.org. Retrieved 2 October 2013.
- ^ Handley, Neil. "Tonometers". Archived from the original on 2 November 2013. Retrieved 31 October 2013.
- ^ Ytteborg, Jan (10 February 2001). "Hjalmar Schiøtz og hans tonometer". Tidsskrift for den Norske Legeforening.