Optic nerve gliomas were diagnosed with computed tomography (CT) in 10 children. CT provides the best radiographic means of demonstrating the orbital portion of the optic nerves; can evaluate the clinically unsuspected optic nerve for bilateral gliomas; demonstrates gross intracranial involvement and can be used to follow the course of a glioma. Gliomas can present on CT as uniform thickening of the entire nerve; solitary fusiform enlargement of the nerve; or irregular solid thickening along the nerve. Axial CT of optic nerves is routinely used as the primary diagnostic scan.