One of the most well-known and noticeable effects of smoking marijuana is the red eyes. This happens because THC, or tetrahydrocannabinol, the chemical responsible for most of marijuana’s psychological effects, lowers blood pressure, dilates the blood vessels, and enhances blood flow throughout the body. This process causes the blood vessels in the eyes to dilate, resulting in redness or bloodshot eyes. However, the impact of marijuana on peripheral vision, changing eye pressure, and visual processing is still not completely understood, and further research is needed in this area.
In a bid to do just that, researchers from the University of Georgia’s Department of Optics conducted an extensive visual trial on 31 cannabis users, both before and after they had consumed any substance, per a press release. They also investigated the subjects’ perceptions of the visual impacts of the drug.
It was seen that the subjects’ visual features such as visual acuity, contrast sensitivity, three-dimensional vision (stereopsis), the ability to focus, and glare sensitivity significantly worsened following consumption.
R&I – FS