Who Should Be Financially Responsible for Revision Blepharoplasty?

Dear Anna
I am not an attorney. You are really asking a legal question.
However, it is generally in almost all consents that additional surgery may be needed in the future and that complications of surgery can occur and this is the risk the patient bares in undertaking not just cosmetic surgery but any surgery.
In particular eyelid surgery often requires revisional surgery. A big part of the problem is that the eyelids must work while they heal. Swelling of the eyelids following surgery can worsen an existing droopy eyelid or even cause a droopy eyelid. Generally this is not the fault of the surgeon but rather a known potential risk of having the surgery.
We live in a litigious society so you might find an attorney who would take your case but unless there was something particularly outrageous about what your surgeon did or did not do, I think most surgeons would not equate patient dissatisfaction, or even a post-operative eyelid malposition with medical malpractice. A doctor can do every thing right but you may still have an issue following surgery that necessitates further surgery. Generally because of the unpredictability of how individuals heal from surgery and even how they will subjectively feel about the outcome of surgery, surgeons do not offer guarantees regarding the outcome of surgery. We simply try to do the best for our patients. It is likely that this information was in your surgical consent.
If your relationship with your doctor has not broken down, many surgeons will do their best to make a dissatisfied patient happy including offering discounted revisional surgery. If your relationship has broken down with your original surgeon, you might explore with you new surgeon whether your particular problem might be covered by your health insurance.

Revisional surgery and the costs that go with it is always a delicate situation. Each surgeon's policy on it is different. For example if I think a revision is needed than the patient is responsible for the OR and anesthesia costs but I will not charge them as long as it is in the first year. Other surgeons charge a surgeons fee which I don't agree with but it's up to them. I tell my patients during their preoperative meeting.
So unfortunately you will be responsible for most of the costs.