How is DCF secured to the nose to prevent shifting? Too high, causes pressure on skin and problems? Eyelids now asymmetric.

Surgeons use different methods for securing the DCF.  I prefer to create a pocket along the bridge which is the exact size of the DCF to be placed, and by using percutaneous sutures to reinforce its position.  Accurate placement of the nasal splint is then necessary to maintain its shape and position.  If the diced cartilage fascia graft is significantly out of position, then a revision rhinoplasty surgery is likely necessary to place in it the correct position.  

I typically dissect the pocket for the graft to precisely fit and stabilize the graft, sometimes adding sutures to further stabilize it. If it remains out of position, there are several options for revision. An exam and discussion with a surgeon would be necessary to decide specifics.