This study is looking at how caffeine affects blood flow in the back of the eye for people with glaucoma and healthy individuals. Participants will receive one 200 mg caffeine tablet. Researchers will measure blood flow changes in the back of your eye before and after taking caffeine using a special imaging tool called optical coherence tomography angiography (OCTA). This helps them see how caffeine might decrease blood flow. The study aims to enroll 80 people between 18 and 90 years old, including those with primary open-angle glaucoma and healthy individuals without eye disease. The current status of the study is unclear.

Study design

This is an interventional study, meaning participants will receive a specific intervention (a caffeine tablet). It plans to enroll 80 participants.

What's involved

You would complete baseline study tasks, then ingest a 200 mg caffeine tablet. Blood flow in the back of your eye will be measured at baseline, Hour 1, and Hour 2.

Compensation

Not stated in the trial record.

Follow-up

Blood flow changes are measured at Baseline, Hour 1, and Hour 2 after caffeine intake.

AI-generated from the public study record. Only the study team can confirm whether you're eligible — confirm details with them before making decisions.