Zeus, a 7-year-old, male-castrated, mixed-breed canine, presented to the Cornell University Companion Animal Hospital Ophthalmology Service on August 19, 2003 for cataract phacoemulsification and intraocular lens implantation. His diabetes had been diagnosed one year previously when he had acute onset of cataract formation. According to the owners, his visual acuity had gotten progressively worse since initial cataract diagnosis. His diabetes mellitus was well-controlled (blood glucose curve consistently around 250 mg/dL) with 50 units of N-insulin twice a day. The owners had been administering neomycin-polymyxin-dexamethasone (NPD) ointment as needed for red eye, caused by lens-induced uveitis. Zeus had no other significant medical history, and was otherwise in good health.