Which procedure would be best to correct my sclera show? (photos)

Hello! This is a great and complex series of questions. In short, it’s difficult to determine from pictures alone. The droopiness of the upper lid is, as you clearly understand, an interplay between the position of the brows and associated frontalis activation, as well as the upper lid itself. You may have some lavator dehisence as well, and these things would need teased out by a comprehensive exam. It is likely a combination of the 2, and you could get a great result with an upper lid incision to address the lavator and perform an internal brow pexy through the same approach. The scleral show is an independent lower lid issue that, depending on the laxity of your lower lid, would need either a standard or lateral strip type canthoplasty to adjust the vector and alleviate the scleral show.