Skip to content

Cannabis and Eye Health: What Adults Need to Know

As cannabis gains widespread acceptance for its medicinal properties, many adults are curious about its effects on various aspects of health, including eye health.

This blog delves into what current research says about cannabis and its impact on eye health, offering insights for adults considering cannabis for ocular conditions or wondering about its general effects on vision.

Understanding the Connection

Cannabis is known to affect the eyes, but how it does so and what implications this has for eye health is a complex topic. One of the most noticeable immediate effects of cannabis consumption is redness of the eyes, which is due to vasodilation as THC lowers blood pressure, causing blood vessels and capillaries to expand.

Glaucoma and Cannabis

One of the most discussed aspects of cannabis and eye health is its relationship with glaucoma, a group of eye conditions that damage the optic nerve, the health of which is vital for good vision. This damage is often caused by abnormally high pressure in the eye (intraocular pressure or IOP). Research has shown that cannabis can temporarily reduce IOP in both individuals with glaucoma and those without the condition.

However, the American Academy of Ophthalmology does not endorse cannabis as a treatment for glaucoma, citing the short duration of its effects and the lack of evidence that it can alter the course of the disease. Patients would need to consume cannabis every few hours to sustain the reduction in IOP, making it less effective than current medical treatments.

Potential Benefits and Risks

Beyond glaucoma, research on cannabis' impact on eye health is limited. Some studies suggest potential neuroprotective effects that could benefit ocular health, but these findings are preliminary.

Conversely, there are considerations regarding potential risks. The smoke from cannabis, like tobacco smoke, can irritate the eyes, and if consumed excessively, the temporary decrease in blood pressure could potentially lead to insufficient blood flow to the optic nerve.

Cannabis and Vision Quality

Anecdotal reports vary regarding how cannabis affects vision. Some users report sharper visuals and enhanced colors, while others experience slight blurriness or changes in light sensitivity. More scientific research is needed to understand these effects fully and their implications for overall eye health.

Recommendations for Adults Considering Cannabis for Eye Health

  1. Consult with Healthcare Professionals: Before using cannabis for any health-related purpose, consult with an eye care specialist to discuss your specific condition and the potential risks and benefits.

  2. Consider Legal Implications: Ensure you are aware of the legal status of cannabis in your jurisdiction, particularly regarding medicinal use.

  3. Monitor Symptoms: If using cannabis, keep a log of any changes in your vision or eye health, which can be useful for discussions with your healthcare provider.

  4. Explore Alternatives: If considering cannabis for glaucoma or another eye condition, explore all available treatment options to find the most effective and least harmful solution.


While the intrigue around cannabis and eye health, particularly for conditions like glaucoma, continues to grow, it's crucial for adults to approach this topic with caution and informed understanding.

Current research suggests that while cannabis can offer temporary relief for certain conditions like glaucoma, its efficacy and safety as a long-term treatment option are not yet established.

As the scientific community delves deeper into the nuances of cannabis and its health implications, adults should stay informed, consult with medical professionals, and consider all aspects of their eye health when contemplating cannabis use.

How do you view the evolving research on cannabis and eye health, and what factors would influence your decision to use cannabis for an ocular condition?


Your cart is currently empty.

Start Shopping

Select options