 Tonometry is usually conducted by clinicians in an eye clinic. Some tonometers e.g., Icare have the potential to be used by the individual for home monitoring of IOP for patients with suspected glaucomaglaucoma. Self-monitoring of IOP via home tonometry will allow patients to undergo IOP measurements at different points in time e.g., early morning and night-time, and it can help determine diurnal changes and spikes. 