Comparing Different Self-Tonometry Devices against Goldmann Applanation Tonometry – Special Focus on Biomechanical Properties of the Cornea

We consider differences in readings using the two self-tonometers compared against GAT as the established reference method to be within acceptable tolerances. Monitoring changes in readings using either device over an extended period - such as gradual increases in intraocular pressure values - is far more important in clinical practice. The measurement sequence requires special consideration due to interplay between measurement methods when comparing readings from different tonometers. We recommend taking iCare HOME readings before applanation tonometry. Biomechanical corneal properties especially need to be considered in iCare HOME and Ocuton S*TT-MV self-tonometers. CRF values affect readings from both self-tonometers. CH values should also be considered when interpreting readings from Ocuton S*TT-MV.