Dr. Keyser completed medical school at the University of Michigan in 1968. Following medical school, he did a rotating internship at the University of Washington, Harborview Hospital. After two and one half years of service in the Navy as a Flight Surgeon he moved to Colorado where he did a residency in Ophthalmology at the University of Colorado. Dr. Keyser specializes in refractive surgery, cataract surgery, glaucoma surgery and retinal laser surgery. He is board certified by the American Board of Ophthalmology since 1976, and is a Clinical Professor of Ophthalmology teaching the residents on a weekly basis at the University of Colorado Health Sciences Center.
Dr. Keyser has been performing refractive surgery since 1974 and started performing PRK and LASIK surgery in 1996 when it was first approved in the United States. He was one of the founding physicians of the Clear Vision Laser Centers in the Denver metro area.