Approximately 90 percent of cannabis users say the drug does not impair their vision, but a new study found it does the complete opposite.
A team at the University of Granada determined smoking marijuana alters key visual functions that could deem the person visual impaired and a potential threat when driving.
Visual trials conducted with 31 cannabis users showed, following consumption of the drug, visual aspects such as visual acuity, contrast sensitivity, three-dimensional vision (stereopsis), the ability to focus, and glare sensitivity significantly worsened.
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