Strabismus at Rainbow Babies and Children's Hospital—one of the top Children's Hospitals in the nation. She also served on the faculty of Case Western Reserve University School of Medicine. She has delivered numerous lectures and presentations at the national, regional, and local levels and has authored several original scientific articles and chapters. Dr. Jeffery's areas of recognized expertise include amblyopia, adult and pediatric strabismus, neonatal ophthalmology and ROP, neurologic diseases affecting the eye, nerve palsies, tumors, and optic neuropathies.