Growing up, you likely learned about a list of veggies, including Vitamin-A rich carrots, that can improve your eyesight, but marijuana probably wasn’t on that list. Now, researchers from the Montreal Neurological Institute suggest smoking weed may help your night vision by decreasing the eyes’ sensitivity to light.
The belief marijuana could improve, not impair, vision goes against conventional wisdom. One of the drug’s key effects on eye health is redness. THC, the drug’s active ingredient, lowers blood pressure, which dilates the blood vessels and increases blood flow to the body. This leads the blood vessels in the eye to expand and causes redness or bloodshot eyes. But researchers found applying a synthetic cannabinoid to eye tissue can make cells more sensitive by increasing the rate they fired to both bright and dim light stimuli.
“Initially you distrust yourself when you see something that goes against widely held ideas, but we tried the experiment so many times, using diverse techniques, and it was a consistent result,” said Ed Ruthazer, senior author of the paper, and a professor of neurology and neurosurgery at the Montreal Neurological Institute of McGill University, in a statement.
– Read the entire article at Alternet.