Application of a self-tonometer to home tonometry

Area of Science:

• Ophthalmology
• Biomedical Engineering

Background:

• Home tonometry is crucial for glaucoma management and diagnosis.
• Lack of appropriate instrumentation has hindered routine home tonometry.
• Glaucoma diagnosis and monitoring require accurate intraocular pressure (IOP) measurement.

Purpose of the Study:

• To develop and evaluate a novel self-tonometer for patient use at home and work.
• To assess the performance, reproducibility, and safety of the self-tonometer.
• To explore the benefits of repeated diurnal intraocular pressure curves in glaucoma management.

Main Methods:

• Development of a novel self-tonometer for patient self-measurement of IOP.
• Evaluation of the self-tonometer's performance in home and work environments.
• Comparison of self-tonometer readings with Goldmann tonometer measurements.
• Assessment of patient training and safety for self-tonometry.

Main Results:

• Self-tonometer measurements demonstrated high reproducibility (+/- 1.4 mm Hg), independent of the user.
• Readings from the self-tonometer showed good agreement with the Goldmann tonometer (+/- 2.4 mm Hg).
• Patients trained in the clinic performed self-tonometry safely and effectively, requiring minimal attempts for readings.

Conclusions:

• The developed self-tonometer is a viable tool for home tonometry in glaucoma management.
• Patient self-measurement of IOP at home is feasible, safe, and reproducible.
• Repeated diurnal curve measurements using a self-tonometer offer significant benefits for glaucoma monitoring.