Fig. 2
a High-resolution head axial CT shows extended bone hypertrophy of the left lesser wing of sphenoid bone and anterior clinoid process. b High-resolution head coronal CT shows narrowing of the left optic canal, which accounts for the visual acuity disturbance. c Bone 3 dimensional-CT shows prominence of the left facial bone and the marked difference relative to the right side. d The sphenoid bone is quite thick. It is difficult to identify the superior wall of the optic canal