How long is the wait time after upper and lower eye surgery before I can have lash extensions applied?

Only your surgeon knows how you are healing. It is best to contact their office for advice.  That said around 1 month would be safe in most cases.  The concern would be if the lashes were accidentally pulled off and disrupted a weak incision.  It's always better to be conservative.

Thank you for your question.  I would wait until you have healed well from surgery before applying lash extensions.  That would depend on how your are healing post-operatively, which would depend on your surgeons examination and recommendations.  In general, I would wait about a month.  Best wishes.