Schiøtz tonometer
Schiøtz tonometer | |
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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
External links
- How to measure intraocular pressure: Schiötz tonometry