In this video, Dr. James E. Croley III, a board-certified ophthalmologist in Cape Coral, Florida, explains that marijuana can reduce eye pressure. However, its effect only lasts for about 3-4 hours before eye pressure increases once again.
Case of the Day- Marijuana Treats Glaucoma
Description of marijuana and its use for treating glaucoma. Marijuana lowers the intraocular pressure by 25% but is very short acting. It would require smoking marijuana every 3 to 4 hours in order to lower the eye pressure.