• Eye pressure: Not established. THC lowers eye pressure for only 3 to 4 hours, so it would need 6 to 8 doses a day . It may also reduce blood flow to the optic nerve.

Compared with standard treatment: Eye drops, laser , and surgery control pressure around the clock. The American Academy of Ophthalmology does not recommend cannabis for glaucoma.

Good to know: Using cannabis instead of glaucoma treatment can cause permanent vision loss.

What to ask for: No product is recommended for glaucoma.