Eyelid Retraction repair, how long will it take to heal, I'm still red and puffy after 4 weeks.

It is likely eyelid retraction as swelling doesn't persist this long after surgery but best to see an oculoplastic surgeon for evaluation. See following link too.

The lower blepharoplasty damages the motor nerves to the muscle along the edge of the lower eyelid margin that holds the eyelid against the eye.  Surgeons attempt to replace this hammock function that is damaged by tightening the lower eyelid.  There are several problems with this approach.  ...

Lower eyelid retraction is safe, based on surgeon's experience. See following link for more details. The repair may require spacer graft inside the eyelid.

Generally if you are satisfied with the position of the lower eyelids, the situation should be stable given that your last surgery was 16 months ago.  If things do change over time, an answer from a surgeon posting on Realself will have very little bearing on your actual situation.  At that p...

Best to see an oculoplastic specialist for in person evaluation. Eyelid revision surgery (namely eyelid retraction surgery after lower blepharoplasty) is definitely possible. See links on my website for more details.

However, your eyes may not tolerate waiting.  The eyelids need to protect the corneal surface.  Under certain circumstances we do intervene early when it is clear that corneal decompensation warrants early intervention.