Facial asymmetry refers to a face that is not perfectly balanced or symmetrical. It means that one side of the face may look different from the other. Full definition
I had developed ptosis of the right eyelid and facial asymmetry in addition to my other symptoms. (theknockoutproject.org)
-- Mild to moderate facial asymmetry — An open mouth posture — Problems with eating and drinking — Shortening of neck or trunk muscles — Decreased strength — Misshaping of the skull (babyflathead.org)