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Updated: Jul 19, 2026
09:03
Trabecular Meshwork Response to Pressure Elevation in the Living Human Eye
Published on: June 20, 2015
[New trends in tonometry].
J A Draeger1, T Schwenteck, P C Ruokonen
1Universitäts-Augenklinik Hamburg, Eppendorf, Klinik und Poliklinik für AugenheilkundeMartinistr, Hamburg. k.sebestyen@uke.uni-hamburg.de
Klinische Monatsblatter Fur Augenheilkunde
|October 26, 2006
Summary
Modern tonometry uses advanced electronics to measure intraocular pressure (IOP), crucial for glaucoma management. However, newer devices often lack improved precision compared to traditional methods, as revealed by calibration studies.
Area of Science:
- Ophthalmology
- Biomedical Engineering
- Medical Instrumentation
Context:
- Elevated intraocular pressure (IOP) is a long-recognized risk factor for glaucoma development and progression.
- Tonometry, the measurement of IOP, has evolved significantly over centuries.
- Modern trends focus on electronic advancements in tonometer design.
Purpose:
- To review the latest trends in tonometry, particularly focusing on modern electronic instrument design.
- To discuss various tonometer types and their underlying measurement principles.
- To evaluate the precision of contemporary tonometers.
Summary:
- Applanation tonometry, pioneered by Goldmann, measures IOP by correlating applanated corneal area and applied force.
- Developments include position-independent and gravity-independent devices, electronic area detection, and automatic UV disinfection.
- Alternative methods like air-puff tonometry, impedance principles through closed eyelids, and direct surface sensor measurements are explored.
- Early attempts involved wave frequency exposure and reflectivity changes to calculate IOP.
Impact:
- Despite advancements in electronic technology, many new tonometer devices do not achieve superior precision.
- Modern calibration methods highlight limitations in the accuracy of some advanced tonometry instruments.
- The pursuit of accurate and reliable IOP measurement continues to drive innovation in ophthalmic instrumentation.
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