Published studies using CDP Choline have shown it to reduce glaucoma eye pressure (and blood pressure). The amount used has been 1000 mg daily. It's not cheap so I've been using 250 mg caps daily. Glaucoma is in one eye and pressure is down to 17-18 but would probably be lower with 500mgs or 1000mgs. CDP Choline is also used as an anti-aging brain supplement. I take it after breakfast. No unwanted side effects. Tests have shown the eye to be in fairly good shape.