Is revision/correction required for my bilateral ptosis surgery? (Photos)

Thank you for sharing your question and posting your photographs. You still seem somewhat swollen. Let another month pass and then judge the results. Good luck!

Best to wait 3 months and communicate with your surgeon. Revision ptosis surgery can be considered at that time.

You are very soon after your Ptosis surgery -- 3 weeks is too early to tell your final result which takes 6 months to a year. That being said, your lids look still very droopy to me -- did you discuss this with your surgeon? I would follow his/her advice while you recover since they will be familiar to what was done during the surgery and how they expect your recovery to progress. Ptosis surgery is technically demanding and delicate, and even in the best hands it can be very difficult to achieve a perfect outcome / symmetry. I have performed thousands of eyelid surgeries and I am well familiar with how challenging it can be. If after you have healed you are unsatisfied with your outcome, you could consider a second opinion regarding a revision. Revision surgery is not a medically necessary procedure and not covered by health insurance in my practice. 
Good luck!
Damon B. Chandler, MD
Harvard-Penn Trained Oculofacial Plastic Surgeon