Dr. Sigler started the first veterinary eye clinic in the state of Arizona in 1980. He was educated at Purdue University, Colorado State University, University of Minnesota, and Stanford University. He has been a Diplomate of the American College of Veterinary Ophthalmologists since 1977. Dr. Sigler has given many educational lectures to national and local doctors on veterinary ophthalmology and he has also served as past president of the Central Arizona Veterinary Medical Association. His clinical interests include intraocular surgery and corneal disease.