For most people, after extended eyeglass or sunglass wear the pads from the glasses will put pressure on the dorsum (bridge of the nose) and cause indentations. Usually this is not an issue, as once the glasses are removed the indentations will resolve. In the operated nose, however, this pressure can be enough to create permanent contour irregularities and even shift any grafts that may have been placed during surgery.
Especially when osteotomies are performed (the nasal bones are fractured) or dorsal augmentation is performed with a DCF (diced cartilage fascia graft) during the nose job surgery, it will take 5-6 weeks for the bridge to safely accommodate the pressure of glasses and sunglasses. Patients may choose to tape their glasses to their forehead to take pressure away from the nose. Also, I have available for my patients a pre-fabricated headband with a small hook to support the glasses that performs the same function.