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Roberto Ebner, MD; Leonardo Salgado, PhD
Buenos Aires, Argentina

Arch Ophthalmol. 2003;121:294-295.

	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

SEVENTY MILLION years ago, the image of a prey was transported through this optic canal to the dinosaur's visual cortex (Figure 1). In 1983, the skull of this exceptional dinosaur was unearthed at the Allen formation levels (superior cretaceous era), at Pellegrini Lake, next to Cipolletti, in Rio Negro province in the Patagonia region of Argentina.

Figure appears in full text version. A, Artist's rendition of the complete skinned head of the Abelisaurus. B, Lateral view of the real Abelisaurus' skull. X-X indicates the computed tomographic scan level. C, Computed tomographic scan, coronal view. The image shows the right optic canal (large open circle) and the sella turcica (arrow). PPS indicates plaster supporting system (this support system having been built by Dr Salgado and the scan having been taken by Federico Dalla Torre, MD); JW, the dinosaur's jaw. At the bottom of the image what looks like . . . [Full Text of this Article]