Eighty five canine eyes performed phacoemulsification for cataract extraction between January 1999 and December 2001 were reviewed. Mean age was 7.26 years old and main breed was poodle (37 dogs). Mature cataract was 51.76％, immature cataract 27.05% and hypermature 21.18％. Improvement of vision was detected in 75 (88.24%) of 85 eyes at 4 weeks after surgery. Postoperative complications were posterior capsular opacification(6), partial posterior synechia(5), glaucoma(3) and uveitis(2). Reasons for failure of visual improvement among the patients performed phacoemulsification were mainly related to development of postoperative anterior uveitis, secondary glaucoma and progressive retinal degeneration.