Marcus Gunn Jaw Winking Syndrome (MGJWS) is a rare congenital condition characterized by an abnormal connection between the muscles controlling eye movement and those involved in jaw movement. Specifically, when the child moves their jaw (e.g., during chewing or sucking), there is an involuntary upward movement of the upper eyelid on the affected side. This condition is also known as the trigemino-oculomotor synkinesis.
