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The only currently approved medical approach for glaucoma is regular eye exams to monitor the condition. Follow your eye doctor’s advice to manage this condition if you are diagnosed with it. This will likely mean eye drops first to prevent vision loss. It could also mean laser eye surgery, drainage devices, or other types of surgery to alleviate intraocular pressure and reduce damage to the optic nerve.

A study conducted in 2018 found that THC and CBD regulate eye pressure differently. When they are separated from marijuana, they will have radically different effects.

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Follow Your Eye Doctor’s Treatment Plan for Treating Eye Conditions

CBD has become a touted treatment for various issues, including glaucoma. This is based on older medical studies and anecdotal reports that CBD oil, eye drops, and other forms of medical marijuana help to ease anxiety, eye strain, and eye pressure.

However, the studies also found that these pressure-lowering effects would wear off after a certain amount of time, while the effects of glaucoma eye drop treatment lasted at least 12 hours. It is vital for eye health that treatment to manage intraocular pressure lasts for a long time and is consistent. When eye pressure rises and lowers several times throughout the day, damage to the optic nerve can get worse.

The United States Food and Drug Administration (FDA) has approved CBD for some very limited medical uses, and several states have legalized both medical and recreational use of marijuana, both THC and CBD.

CBD in particular is receiving a lot of attention from the medical community and medical marijuana proponents. However, studies suggest that the CBD compound may make intraocular pressure higher, while THC (tetrahydrocannabinol), the chemical in marijuana associated with substance abuse and getting high, is responsible for lowering eye pressure.

Marijuana can cause permanent lung damage when smoked, and possible permanent adverse effects on cognition and mental health. With regular use, tolerance to the eye pressure-lowering effects develops, meaning that increasing drug levels would be required to prevent progression of glaucoma. Moreover, lack of regulation and quality control makes efficacy and safety of marijuana unpredictable. Research efforts to develop THC eyedrops that can effectively lower eye pressure while minimizing side effects are being studied, but have not yet been successful.

While marijuana does lower IOP, it has major drawbacks as a treatment for a chronic, long-term, disease like glaucoma:

As marijuana use becomes more accepted and increasingly legalized, glaucoma patients frequently ask if marijuana can really treat glaucoma. We need to explain some truths and dispel some myths.

What About CBD (cannabidiol) Oil?

Marijuana is legal for medical use in 30 US states and for recreational use in 9 US States. It’s legal across Canada for recreational use. Despite the relaxed attitude around marijuana, it is still classified by the federal Drug Enforcement Agency as a Schedule I controlled substance (the same category as heroin and LSD ).

New evidence has emerged showing that parts of the cannabis plant, specifically cannabidiol (CBD), the non-intoxicating, trendy component, may actually worsen glaucoma symptoms. Researchers at Indiana University published a study in the journal Investigative Ophthalmology & Visual Science that shows CBD increases pressure in the eye. This is problematic, they say, considering that CBD has become such a household name in American culture that many people, some of which may have or be at risk for glaucoma, are using it haphazardly as a natural, harmless medicine. But in reality, CBD could be destroying their overall eye health.

Marijuana’s ability to lower intraocular pressure (IOP) was discovered in the 1970s. Elevated IOP is the major risk factor for developing glaucoma and for the progression of glaucoma. Treatment is focused solely on reducing IOP. Many have wondered whether marijuana could be used as a therapy to lower IOP and prevent glaucoma from getting worse or causing blindness.

For these reasons, smoking marijuana or using CBD oil is not recommended as a medical treatment for glaucoma. If you use marijuana or CBD oil, let your ophthalmologist know since it may have an impact on your eye pressure readings. Also, it is very important to continue the glaucoma treatment recommended by your ophthalmologist. This treatment and regular monitoring can help you maintain your vision for the rest of your life.