Self-monitoring of the Intraocular Pressure Versus Hospital-based Diurnal Monitoring

This study compares two methods of monitoring eye pressure (intraocular pressure) in glaucoma patients: self-monitoring at home using a handheld device versus the traditional method of multiple measurements taken at the hospital over the course of a day. The goal is to determine if home monitoring is accurate enough to guide treatment. **You may be eligible if...** - You are 18 or older with glaucoma, or you are a healthy control participant - You have adequate vision and corneal thickness within normal range - Your glaucoma treatment has been stable for at least 30 days - You have passed a certification test to use the self-monitoring device correctly **You may NOT be eligible if...** - You have had eye trauma or have a corneal condition like keratoconus - You have dry eye disease or a physical disability that prevents self-measurement - You have Parkinson's disease or arthritis that would prevent accurate self-testing Talk to your doctor to see if this trial is right for you.