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Self-tonometry with the Ocuton S versus Goldmann tonometry
I Theofylaktopoulos1, M Diestelhorst, G K Krieglstein
1University Eye Hospital of Cologne, Joseph-Stelzmann-Strasse 9, D-50931 Cologne, Germany, Jannis.T@t-online.de
Summary
The Ocuton S self-tonometer is acceptable for home intraocular pressure (IOP) measurement by most patients, but requires accuracy improvements. Further research is needed for this IOP device.
Area of Science:
- Ophthalmology
- Medical Devices
- Biomedical Engineering
Background:
- Intraocular pressure (IOP) monitoring is crucial for glaucoma management.
- Self-tonometry offers potential for convenient home IOP measurement.
- The Ocuton S is a novel device for patient self-measurement of IOP.
Purpose of the Study:
- To assess the acceptance and reproducibility of the Ocuton S self-tonometer.
- To compare the Ocuton S measurements with the Goldmann applanation tonometer.
- To evaluate patient usability and comfort with the Ocuton S device.
Main Methods:
- The Ocuton S was tested in 20 healthy volunteers and 100 patients.
- Reproducibility and accuracy were assessed in volunteers with and without topical anesthesia.
- Patient acceptance was measured using visual analogue scales.
- Patient IOP measurements were compared against Goldmann tonometry.
Main Results:
- 59% of patients successfully performed consecutive IOP measurements with the Ocuton S.
- Ocuton S measurements (mean 23.2 mmHg) were significantly higher than Goldmann tonometry (mean 18.4 mmHg).
- Volunteer comfort scores were higher with anesthetic (72/100) compared to without (39/100).
Conclusions:
- The Ocuton S demonstrates patient acceptability for home IOP monitoring.
- The device's accuracy requires significant refinement for clinical use.
- Further development is needed to improve the Ocuton S's performance and reliability.