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Nine of 13 bilateral palsies were due to trauma. The masked bilateral palsy was congenital. Between the ages of birth and 10 years 26 of 37 (70.1%) palsies were congenital. Between the ages of 21 and 40 years 17/35 (48.6%) were due to trauma. Within the remaining age groups 11-20 years, 41-60 years, and over 60 years, the most common etiology was idiopathic 7/13 (53.8%), 11/24 (45.8%), and 7/15 (46.7%) respectively. Surgery was the most common treatment option within all age groups with the exception of the over 60 group. In this age group, prisms alone was most common.

An infant with bilateral Peters’ Anomaly, with corneal opacification in the right eye and an opacification with an axial defect in the left also had an associated hydrocephalus and cardiac anomalies that proved fatal; histopathology of the right eye showed retinal neovascularization in addition to findings consistent with a diagnosis of Peters’ Anomaly; in the left eye, pathologic findings were suggestive of a corneal coloboma associated with aphakia.