Caffeine Consumption in Glaucoma Patients and Healthy Subjects (NCT03675412) | Clinical Trial Compass
RecruitingNot Applicable
Caffeine Consumption in Glaucoma Patients and Healthy Subjects
United States80 participantsStarted 2018-12-30
Plain-language summary
Caffeine is the most widely consumed drinking nutrient in the world. Caffeine effects various organs and the vascular system. It decreases ocular blood flow due to vasoconstriction.
Who can participate
Age range
18 Years – 90 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* age 18 to 90 years
* diagnosis of primary open angle glaucoma (Mild, Moderate and Advanced)
* healthy subjects with no eye disease
Exclusion Criteria:
* Diseases, ophthalmic or systemic, that are likely to affect OCTA results
* greater than moderate cataract
* nystagmus
* inability to look at target
* macular degeneration other than mild drusen or pigmentary changes
* diabetic retinopathy
* neovascular glaucoma or non-glaucoma optic neuropathies
* current macular edema, prior laser to retina, inflammatory retinopathy or choroidopathy
* keratoconus, corneal ectasia, central corneal scarring
* rheumatologic diseases or Raynaud's phenomena
* pregnant and lactating women
* mental illness or alcohol addiction
* pre-existing bladder symptoms, cardiac disease or sleep disorder
* refractive spherical diopter greater than 5 or cylinder greater than 3
* possible tolerance to caffeine (drinking more than 1 cup coffee per day).
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Blood flow change in back of eye before and after caffeine