is it ok to have a beer or two the day before upper eyelid surgery?

Upper eyelid surgery rarely presents with any bleeding problems, however we generally recommend avoiding alcohol ,aspirin, and other substances that can contribute to increased bleeding and the bruising that accompanies it. I would tell you it is best to follow your surgeons instructions regarding this

It is best to ask this question to your surgeon.However, in my practice, a beer  or glass of wine with dinner  is fine to consume, and may help you relax a bit before your surgery.

To help promote optimal wound healing it is best to avoid alcohol consumption prior to and immediately after surgery. Additionally, for patients who smoke cigarettes, it is recommended to discontinue tobacco use for a minimum of two weeks prior to surgery and a minimum of two weeks after surgery.

You should refrain from alcohol use prior to surgery as it increases your risk of bleeding and bruising. It is simply not worth risking it.

Excessive use of alcohol prior to surgery can prolong your bleeding time and lead to more swelling and bruising in the postoperative period.  Although having a beer or two isn't absolutely contraindicated, it is preferable that you abstain in order to give yourself the best chance at healing quickly. 

Alcohol thins the blood making the risk of bleeding, bruising and swelling much higher. There is always bruising and swelling after eyelid surgery, but drinking any alcohol or taking any anticoagulants increase the probability of worse, longer lasting bruising and swelling, as well as bleeding during surgery.
Because of this, I would recommended you speak with your surgeon about your current drinking habits.

anxiety leads to surgical complications both if its the surgeon and the patient so be relaxed, enjoy your recovery time and take it easy. Hope that helps. Adam Goodwin

It's always best to check with your surgeon, and I'm sure they told you to limit alcohol intake to a minimum to ensure optimum healing.

It is very likely that your surgeon recommended avoiding alcohol prior to your surgery. Alcohol consumption can increase the risk of bleeding and may interact with any antibiotics you may have been given. It is important to always follow instructions in order to optimize your surgical results. 

Im certain your surgeon has advised you against any alcohol use prior to surgery. Please follow your surgeon's instructions and recommendations.