I think this is an important question. Historically, most surgeons have taken a "don't ask, don't tell" approach when it comes to marijuana use after Laser Vision Correction(PRK or LASIK). I believe we need to be more proactive and include this discussion on our list of "do's and don'ts" after surgery. I typically recommend abstaining from marijuana use for about 7-10 days after Lasik, as the environmental irritation of any kind of smoke(including cigarettes) can delay corneal healing somewhat. In addition, one of the known side effects of marijuana is a decrease in the rate of blinking while you are under its effects. This decreased blink rate can result in an increased incidence of temporary dry eye after Lasik.
The bottom line is to use common sense after Laser Vision Correction and follow your surgeons instructions. I am sure I have had thousands of patients, over the years, smoke marijuana the night of their Lasik surgery and just not mention it to me......and they have all done fine. On the other hand, when in the presence of some irritants that we know about, I think it is a good idea to exercise some caution for a short while.