Glaucoma is a group of diseases that cause damage to the eye’s optic nerve that may result in serious issues like vision loss and blindness. Composed of nearly one million nerve fibers, the optic nerve connects the retina to the brain. The retina is light-sensitive tissue that sits at the back of the eye, and it’s important to have a healthy optic nerve in order for your eyes to function properly.

Two Main Types of Glaucoma

Open-angle glaucoma accounts for 90 percent of all glaucoma cases, and it’s caused by the slow clogging of the drainage canals in your eyes. This results in an increased pressure in your eye. The term “open-angle” refers to an abnormally wide angle where the iris meets the cornea. Open-angle glaucoma develops slowly over a period of time.

Angle-closure glaucoma is less common, and it’s caused by a blockage of the eye’s drainage canals, which results in a sudden increase in the intraocular eye pressure (IOP). Just as it sounds, angle-closure glaucoma is a result of the closing angle between the iris and the cornea.


Depending on the type of glaucoma, it can be more difficult to detect because symptoms develop slowly and over a period of time. There is no pain involved and your vision stays normal throughout the development. Glaucoma may develop in one or both eyes.

Losing peripheral vision is a common sign of glaucoma, almost as if the individual has tunnel vision. Detection of glaucoma involves a visual acuity test, a visual field test and a dilated eye exam. Tonometry tests measure the amount of pressure in the eye while pachymetry measures the thickness of your cornea.

Medical Marijuana and Glaucoma

Medical marijuana has long been associated with aiding glaucoma, with studies supporting this treatment. Cannabidiol (CBD), the active ingredient in medical marijuana helps lower the IOP in the glaucoma sufferer by as much as 30 percent. However, the relief may only last three or four hours. Medical cannabis is ideal for helping those with late-stage glaucoma because not only can it provide relief, but also treat symptoms like pain and nausea.

Contact Greenhouse for More Information

Once you have obtained your registry identification card, visit one of our dispensary locations to talk with a professional about how medical cannabis can help provide you with glaucoma relief.