Regular Marijuana Use May Damage Eyesight

Researchers have found that regularly smoking cannabis can increase the risk for vision problems.

Although the study French researchers conducted was rather small – only 52 study participants and only 28 of them used cannabis regularly – they found that in regular users, the cells in a part of the eye known as the retina took a longer amount of time to transmit information to other sections of the eye responsible for seeing objects.

Writing in JAMA Ophthalmology, they noted that this delay might account for the altered vision in people that smoke marijuana often.

“Our findings may be important from a public health perspective since they could highlight the neurotoxic effects of cannabis use on the central nervous system as a result of how it affects retinal processing,” the authors wrote.


Jonathan Block

Jonathan Block

Jonathan Block is an associate editor at BioCentury, which provides news and information about the biotechnology and pharmaceutical industries. Prior to joining BioCentury in 2019, Jonathan worked for MedShadow as content editor. He has been an editor and writer for multiple pharmaceutical, health and medical publications, including The Pink Sheet, Modern Healthcare, Health Plan Week and Psychiatry Advisor. He holds a BA from Tufts University and is earning an MPH with a focus on health policy from the CUNY Graduate School of Public Health & Health Policy.


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