Regular Marijuana Use Might Affect Vision, Study Says

A marijuana habit may alter your vision, according to a new study.

Regular cannabis use delays the processing of visual information at its very beginning, in the retina, the results of a study published Thursday in JAMA Ophthalmologysuggest. This disruption may impact the eyesight of regular pot smokers and edibles eaters, even if the influence is very weak, the authors noted.
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“Such an anomaly could be imperceptible for cannabis users,” said Dr. Vincent Laprevote, lead author of the study and a physician at Pole Hospitalo-Universitaire de Psychiatrie du Grand Nancy in Laxou, France. “However, it is important, since it could reflect the changes in the communication between neural cells implied by regular cannabis use.”
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Cannabis is known to act on synaptic transmissions within the brain. Since the retina is an easy-to-access extension of the central nervous system, a comparison study of retinal processes in both regular marijuana users and controls might provide more information about the drug’s effects in the brain, hypothesized Laprevote and his co-authors.
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The researchers examined whether cannabis disturbs the function of cells known as retinal ganglion cells.

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