Mueller ptosis surgery about 3 months ago (Photos)

You may or may not benefit from further ptosis surgery. Revision eyelid ptosis surgery is different than first time surgery as there is scar tissue present, but it is possible using different technique. Discuss with your surgeon. See following link.

Unfortunately, it is often not the right ptosis surgery.  It will not work for individuals with an anterior levator disinsertion as the basis of their ptosis.  This type of issue is very common in individuals presenting with ptosis after blepharoplasty.  The Mullerectomy works by plicating the elevator tendon as it inserts into the tarsus of the eyelid (the hard platform of the eyelid).  When the central tendon disinserts from the tarsus, which is very common and especially common after prior surgery, this surgery does not work because the tendon is not in place.  Unfortunately this seems to be poorly understood by many eyelid surgeons.  I believe that this is the reason your surgery did not work.  I devote a significant part of my practice to fixing prior eyelid surgery.  You will need that level of expertise to improve this situation.