In-person clinical evaluation is needed to find a cause(s) of asymmetry; possibly additional CT imaging? Mild asymmetries may be successfully treated with combination of fat grafting and/or soft tissue fillers. Large asymmetries which include bone structures may be improved with implants or osteotomies/reshaping. Good luck.
A combination of Botox® Cosmetic/Dysport®/Xeomin® and various dermal fillers such as Radiesse®/Juvederm®/Sculptra®, performed over several treatment sessions over the course of several months can correct many types of facial asymmetries. As these procedures are EXTREMELY complex, please consult an experienced board certified aesthetic dermatologist for a consultation.