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Neuro-Ophthalmology Faculty and Staff


Randy KardonService Director, Randy Kardon M.D., Ph.D., has been part of the neuro-ophthalmology faculty in this Department since 1989. He has continued the Iowa tradition of interest in pupillary questions and has taken pupillary research to a new level of technical sophistication. He is recognized as an important innovator; he has developed several new tests for examining visual function, and has a number of national competitive grants supporting his pupil studies. In addition, he is known as an astute diagnostician, an effective teacher and is a much sought after lecturer.





Michael Wall

Michael Wall, M.D. is a neurologist who trained as a neuro-ophthalmologist in Boston. Dr. Wall has been part of the Neuroophthalmology faculty at Iowa since 1991. Before that he had been a neuro-ophthalmologist at Tulane University in New Orleans. Although based in the Neurology Department, Dr. Wall staffs the Neuroophthalmology Clinic in the Eye Department on certain days of the week. He has a special clinical interest in increased intracranial pressure and its effect on vision. Dr. Wall is also an expert on testing the visual fields and a respected investigator on the subtleties of this important test.





Matthew Thurtell

Dr. Matthew Thurtell joined our Department in December 2010, as Assistant Professor with a joint appointment in Ophthalmology, Neurology and the Department of Veterans Affairs Medical Center. Dr. Thurtell trained in Neurology in Sydney, Australia under the mentorship of Dr. G. Michael Halmagyi, one of the most well known experts in ocular motility and the vestibular system. Following his residency, Dr. Thurtell completed a two year fellowship in Neuroophthalmology with Drs. John Leigh and Robert Tomsak at Case Western Reserve in Cleveland, Ohio. During his clinical fellowship in Cleveland, Dr. Thurtell continued to develop his expertise in eye movement and in the visual afferent system, with special interest in the pathophysiology and treatment of raised intracranial pressure as it pertains to the visual system. Dr. Thurtell then completed a third year of Neuro-ophthalmology fellowship at Emory University in Atlanta, Georgia under the direction and mentorship of Drs. Nancy Newman, Valerie Biousse, and Beau Bruce. Dr. Thurtell adds important expertise to our Iowa Neuro-ophthalmology Service in central and peripheral aspects of ocular motility physiology and pathology. He also continues his interest and expertise in the afferent visual system, including idiopathic intracranial hypertension.


Chris Johnson

Chris A. Johnson, Ph.D. received his undergraduate degree from the University of Oregon, his doctorate from Penn State University and an honorary doctorate from the State University of New York. After postdoctoral training in the Department of Ophthalmology at the University of Florida, he was a faculty member in the Department of Ophthalmology, University of California, Davis for approximately 17 years, and was then a research scientist and director of diagnostic research at Devers Eye Institute in Portland, Oregon for 10.5 years. Dr. Johnson has received considerable research funding throughout his career and has more than 300 publications. He has also been active in several multicenter clinical trials, developing and maintaining several visual field reading centers, and has participated in many collaborative studies with companies in the private sector and has served on a number of national and international committees. Dr. Johnson is the Director of the University of Iowa Visual Field Reading Center.



Stan Thompson

H. Stanley Thompson, M.D., M.S. founded the Neuro-ophthalmology Unit in Iowa City, was its director for 30 years (1967-1997) and is now retired. His interest in the workings of the pupil of the eye stimulated pupillary research in Iowa City and made Iowa known around the world as a place where unusual pupillary problems might be solved.





Marcia Griffin, COA, (left) and Mary Stever Terrill, COA (right) are our clinical technicians. Mary and Marcia do the preliminary examination and some of the tests for most of the patients in our clinic.

Marcia GriffinMary Stever Terrill

Ramona Weber is our service secretary

Ramona Weber

Group photos of past faculty and fellows