It depends on the surgeons--both works great. The levator can give more correction, but in your case i think both will work fine. You do need some skin remove, so an isolated mullerectomy won't remove excess skin--it will correct your visual field defect.
The vast majority of ptosis surgery performed in the United States in the posterior approach ptosis surgery that is also called Mueller's muscle conjunctival resection ptosis surgery. Surgeons love this surgery because it takes about 8 minutes to perform the surgery. In many cases, the surgeon...