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In this undated photo provided by the College of Veterinary Medicine Department of Educational Media and Design shows Richard McMullen, assistant professor of veterinary ophthalmology at North Carolina State University, and second year resident Julie Hempstead, perform cataract surgery on C’sar the African bull elephant at the North Carolina Zoo in Asheboro, N.C. Officials at the North Carolina Zoo in Asheboro and the North Carolina State University’s College of Veterinary Medicine are weighing whether the elephant should the world’s first test subject to be fitted with corrective lenses.

John T. Conte / AP Photo/College of Veterinary Medicine