Abstract
A cross-sectional study of interocular distance in both cleft and non-cleft adolescents was undertaken. Photographic materials were equally as valid as clinical measurements for this purpose. As a group, patients with cleft palate deformity proved to have an increased interocular distance. Comparison with published data demonstrated that this condition was not hypertelorism, but rather euryopy. A triad of symptoms usually associated with cleft deformity was dis-cused. It consisted of euryopy, metopic ridging and extreme basal kyphosis. A sexual differentiation in the expression of this triad was suggested by the data. Males tended to show the complete triad, while females tended to show only euryopy. Both euryopy and cleft deformity were functionally related to a malformation of the pre-sella skull base. Basal kyphosis is related to a post-sella malformation. It was further suggested that in the usual cleft male there existed a malformation of both the pre- and post-sella skull base; while in the usual cleft female a pre-sella malformation existed alone.

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