Marijuana: Smoking marijuana can lower eye pressure. However, due to its short duration of action (3-4 hours), side effects, and lack of evidence that it alters the course of glaucoma, it is not recommended for glaucoma treatment.
Alcohol: Lowers eye pressure for a short duration but some studies suggest that daily alcohol consumption is associated with higher eye pressure. Alcohol use does not appear to alter the risk of developing glaucoma.
Cigarettes: Studies indicate that smoking cigarettes increases the risk of glaucoma, and has an overall negative impact on eye health.