“Morning Glory” Disc Coloboma

A 49-year old male with history of a unilateral congenital optic nerve abnormality detected five days after birth. The patient is aware of an enlarged blind spot in the left eye which has not changed over the years. Vision is reported to be excellent in each eye although the patient is strongly right eye dominant. Fundus examination revealed a large excavated disc with blood vessels emerging in a radial pattern. There is apparent fibroglial tissue in the center of the disc and visible sclera inferior and inferior nasal to disc as well as some pigment clumping. The diagnosis is a congenital disc anomaly in the left eye with clinical characteristics of both optic nerve coloboma and Morning Glory Syndrome (MGS). (Case #8 – “Morning Glory Disc Coloboma)