https://healthblog.uofmhealth.org/health-management/using-medical-marijuana-to-treat-glaucoma
According to Dr. Cooney, marijuana can create a 25 percent IOP reduction in 60 to 65 percent of people with or without glaucoma. What exactly causes this within the drug is unknown. The problem is that IOP reduction lasts from 3 to 3.5 hours.
To treat glaucoma effectively, IOP must be controlled around the clock, which likely leads to compliance issues. “You’d need to smoke eight to 10 marijuana cigarettes a day for them to have the same effectiveness as regular, glaucoma drops,” says Cooney.
"No problem there", says Peat Phreak.
I have ocular hypertension. It's a precursor to glaucoma with a moderate IOP of 27ish instead of 20-22. The doctor's remedy is the same painful glaucoma drops. I tried that for a while. They are not comfortable.
Staying blazed 24/7 got me off the glaucoma drops tho. My slightly elevated IOP is normal when I'm high.
However, glaucoma has a much higher IOP and mismanaging it can lead to permanent blindness. I would not rely on cannabis for this.