Most patients with glaucoma use eye drops to lower their intraocular pressure. However, poor adherence to prescribed eye drop regimens can lead to significant loss of vision-related quality of life. This study will test the iDrop Device (iD2), a device-on-cap electronic platform monitor designed to accurately track when a research participant removes an eye drop bottle cap, wirelessly communicate usage data to a database accessible to researchers, and send on-demand alerts when a medication is due. A device capable of tracking eye drop usage and sending dosage alerts will test the hypothesis that electronic reminders improve medication adherence and help research subjects improve their eye drop taking behavior. While our primary focus is on glaucoma adherence, this device could also benefit those with other chronic eye conditions requiring regular eye drop treatment, such as dry eye, corneal endothelial disease, eye infections, and uveitis.

Inclusion Criteria:

• Age ≥ 18
• Taking at least one glaucoma drop daily
• A history of poor adherence when taking glaucoma eye drops. This is determined as an answer of 80% or less for the following question: "Over the past month, what percentage of your drops do you think you took correctly?"
• Owns a functioning smart phone with Bluetooth and cellular connectivity

Exclusion Criteria:

• Advanced cognitive impairment
• Current or expected pregnancy during the study.