<qa>  What is the goal of the current study?The overall objective of the current study is to conduct a feasibility pilot study on the home tonometer Icare, acquiring initial experience with the Icare tonometer. For this purpose investigators will train up to 20 individuals on how to use the device. Investigators will ask them to record in a diary their IOP twice a day for a period of 2 weeks. Investigators will then compare IOP outcomes with the measurement taken at the clinic. Patients and clinicians will be masked to the IOP data. 