<unk>  is an autosomal dominant condition with incomplete penetrance, in which nursing infants will have rhythmic upward jerking of their upper eyelid. This condition is characterized as a synkinesis: when two or more muscles that are independently innervated have either simultaneous or coordinated movements. Common physiologic examples of synkineses occur during sucking, chewing, or conjugate eye movements. There are also several abnormal cranial nerve synkineses, both acquired and congenital.<unk> <unk>  jaw-winking is an example of a pathologic congenital synkinesis. First described by the ophthalmologist<unk> <unk>  in 1883, this condition presents in approximately 5% of neonates with congenital ptosis. This condition has been associated with amblyopia (in 54% of cases), anisometropia (26%), and strabismus (56%).
Marcus Gunn phenomenon
Tullio phenomenon
Dawn phenomenon
Gallavardin phenomenon
Renbök phenomenon
Ashman phenomenon
Azzopardi phenomenon
Waddell's signs