Blascovicz Operation in a Case of Marcus Gunn Phenomenon.

CONGENITAL ptosis in association with jaw-winking is a clinical entity in which the ptosis disappears and the lid retracts on opening the mouth, or on moving the jaw to the opposite side. This condition, known as the Marcus Gunn phenomenon (Gunn, 1883), has been noted in association with paralysis of the superior rectus (Proskauer, 1891; Goldzeiher, 1892), internal rectus (Uhthoff, 1888), external ophthalmoplegia (Vossius, 1892; Spaeth, 1947), voluntary nystagmus (Soria, 1947), and congenital convergent strabismus (Garkal, 1961). In the following case jaw-winking was associated with left hypotropia in the primary position and upshoot of the right eye on laevoversion.