Self-monitoring of IOP with the Icare Home tonometer proved manageable and accurate in a study.
Measurements were comparable to those performed by an ophthalmologist using the same device and standard Goldman applanation tonometry (GAT).
A total of 130 subjects with suspected or confirmed glaucoma were included. After detailed instructions, 98% of them were able to use the Icare Home device correctly.
Three consecutive IOP measurements were taken in each eye in an office setting, first by an ophthalmologist and then by the patients. These measurements were then compared with GAT measurements taken 5 minutes later. In all the participants, central corneal thickness (CCT) was measured by ultrasound pachymetry.
No significant difference was found between the mean IOP measured with the Icare Home by the patient and by the ophthalmologist, while some difference was found in about half of the patients between Home and GAT measurements. In the majority of these cases, Home tonometry showed a tendency to overestimate IOP, and this occurred more frequently in eyes with higher CCT values.
As the authors noted, “self-tonometry is a valuable option for recording out-of-the-office IOP because the IOP fluctuates both within and across days.”
The Home Icare tonometer is a handheld device that uses the induction-based rebound method and does not require topical anesthetics. Each measurement sequence includes six measurements, on the basis of which the tonometer provides the final IOP measurement. Results are stored with the date and time and can be viewed on a personal computer, using a dedicated software. – by Michela Cimberle
Disclosure: The authors reported no conflict of interest