The diagnosis of interorbital hypertelorism is made by physical examination and radiographic analysis.
Physical examination includes measurement of the intercanthal distance as well as a complete ophthalmologic assessment (lid position, presence or absence of strabismus, lacrimal drainage system etc.). The size and position of the encephalocele is noted.
Genetic evaluation is helpful to establish the presence or absence of a syndrome and to delineate extracranial associated conditions.
CT-scans are used to document the interorbital space and the size and position of the orbits. They are also essential for complete evaluation of the brain. Neurosurgical input is invaluable.
A 3D-CT scan is also useful for the planning of the corrective surgery.