In general, the decision is that of your doctors! What you have to uderstand about alcohol is that a drink here and there is not a problem, however if you have history of drinking alcohol, either as a binge drinker, or a few drinks consistently every week, it could cause scarring of the liver and increase yoru risk for bleeding. With respect to an off handed drink here and there the night before a surgery, it should not have a negative impact on the surgery. The amount that you drink may also impact how effective any sedative is during your surgery, so this is important to discuss with your surgery so the dosing can be planned accordingly. Typically for eyelid surgery, most patients will take 1 or 2 pills of a narcotic the night of surgery only, and after that do not typically need any pain medication other than either Tylenol or Advil. It is very important that you do not combine alcohol with a narcotic, therefore, you need to choose which is more important to you the night of surgery. Best decision is to discuss with your surgeon and follow your doctor's pre and post operative instructions.