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Lasik and Marijuana, A Cannabis Point of View

Possible concerns regarding Lasik, All-Laser Lasik, PRK, LASEK, Epi-Lasik, CK, RLE, and P-IOL


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No direct studies have determined if cannabis is problematic for Lasik or similar refractive surgery techniques.

 

The use of cannabinoids (related terms: cannabis, marijuana, marihuana, hashish, hashich, haschich, cannabinoids, tetrahydrocannabinol, THC, dronabinol, nabilone, levonantradol) when receiving refractive surgery like  conventional or custom wavefront Lasik, All-Laser Lasik, PRK, LASEK, Epi-Lasik, NearVision CK, RLE, does not seem to be directly contraindicated, but a patient should undoubtedly refrain from use for at least two months before surgery and until the end of the recovery period.

Cannabis has been considered a medicinal agent for thousands of years and across many cultures. It reached a position of prominence within Western medicine in the nineteenth century and then became bogged down with legal controls early in the twentieth century. Recreational cannabis exploded into popular culture in the 1960s and has remained easily obtainable on the black market in most countries ever since.

A examination of peer reviewed medical journals finds 72 properly controlled studies evaluating the therapeutic effects of cannabinoids. For each clinical trial, the country where the project was held, the number of patients assessed, the type of study and comparisons done, the products and the dosages used, their efficacy and their adverse effects are described. Cannabinoids present an interesting therapeutic potential as antiemetics, appetite stimulants in debilitating diseases (cancer and AIDS), analgesics, and in the treatment of multiple sclerosis, spinal cord injuries, Tourette's syndrome, epilepsy and glaucoma. It appears from a review of these studies that the use of cannabis concurrent with refractive surgery is not problematic, however no direct evaluation to any refractive surgery technique was performed.

In the absence of a study indicating the use of marijuana is okay, it is reasonable to refrain from its use for a period of time before surgery that any elements would disperse, and until full recovery from surgery. If a surgery related complication were to occur, the patient would not have the added concern of a negative interaction with the medications or treatments necessary to resolve the complication.

If you are ready to choose a doctor to be evaluated for conventional or custom wavefront Lasik, All-Laser Lasik, PRK, LASEK, Epi-Lasik, NearVision CK, RLE, or any refractive surgery procedure, we highly recommend you consider a doctor who has been evaluated and certified by the USAEyes nonprofit organization. Locate a USAEyes Evaluated & Certified Lasik Laser Eye Surgery Doctor.

If this article did not fully answer your questions, use our free Ask Lasik Expert patient forum.


Current Cannabis Medical Journal News...

Cannabis Use Disrupts Eyeblink Conditioning: Evidence for Cannabinoid Modulation of Cerebellar-Dependent Learning.
Related Articles

Cannabis Use Disrupts Eyeblink Conditioning: Evidence for Cannabinoid Modulation of Cerebellar-Dependent Learning.

Neuropsychopharmacology. 2007 Jul 18;

Authors: Skosnik PD, Edwards CR, O'donnell BF, Steffen A, Steinmetz JE, Hetrick WP

While the cerebellum contains the highest density of cannabinoid receptor (CB1) in the brain, no studies have assessed the effect of exogenous cannabinoids on cerebellar-dependent learning in humans. The current study, therefore, examined the effect of chronic cannabis use on classical eyeblink conditioning (EBC), a cerebellar-mediated task which has been shown to be disrupted in CB1 knockout mice. Chronic cannabis users (24 h abstinence before study; positive THC urine drug test) free of DSM-IV Axis-I or -II disorders, were evaluated. A delay EBC task was utilized, in which a conditioned stimulus (CS; 400 ms tone) co-terminated with a corneal air puff unconditioned stimulus (US; 50 ms), thus eliciting a conditioned blink response (CR). The cannabis group exhibited markedly fewer, and more poorly timed CRs as compared to drug-naive controls. There were no differences between the groups in either the unconditioned response (UR) or an EEG measure of selective attention to the CS (N100 auditory ERP), indicating that the disruption observed in the cannabis group was specific to CR acquisition. These results suggest that cannabis use is associated with functional deficits in the cerebellar circuitry underlying EBC, a finding which corroborates the recent work in CB1 knockout mice.Neuropsychopharmacology advance online publication, 18 July 2007; doi:10.1038/sj.npp.1301506.

PMID: 17637608 [PubMed - as supplied by publisher]


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Last updated Thursday, May 15, 2008

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