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Chris A. Johnson
Researcher at University of Iowa Hospitals and Clinics
Publications - 397
Citations - 23600
Chris A. Johnson is an academic researcher from University of Iowa Hospitals and Clinics. The author has contributed to research in topics: Visual field & Glaucoma. The author has an hindex of 69, co-authored 383 publications receiving 21532 citations. Previous affiliations of Chris A. Johnson include Carl Zeiss AG & George Washington University.
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Journal ArticleDOI
The Ocular Hypertension Treatment Study: A Randomized Trial Determines That Topical Ocular Hypotensive Medication Delays or Prevents the Onset of Primary Open-Angle Glaucoma
Michael A. Kass,Dale K. Heuer,Eve J. Higginbotham,Chris A. Johnson,John L. Keltner,J. Philip Miller,Richard K. Parrish,M. Roy Wilson,Mae O. Gordon +8 more
TL;DR: Topical ocular hypotensive medication was effective in delaying or preventing the onset of POAG in individuals with elevated IOP, and clinicians should consider initiating treatment for individuals with ocular hypertension who are at moderate or high risk for developing POAG.
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The Ocular Hypertension Treatment Study: baseline factors that predict the onset of primary open-angle glaucoma.
Mae O. Gordon,Julia A. Beiser,James D. Brandt,Dale K. Heuer,Eve J. Higginbotham,Chris A. Johnson,John L. Keltner,J. Philip Miller,Richard K. Parrish,M. Roy Wilson,Michael A. Kass +10 more
TL;DR: Baseline age, vertical and horizontal cup-disc ratio, pattern standard deviation, and intraocular pressure were good predictors for the onset of POAG in the OHTS and central corneal thickness was found to be a powerful predictor for the development ofPOAG.
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Efficacy and safety of voretigene neparvovec (AAV2-hRPE65v2) in patients with RPE65-mediated inherited retinal dystrophy: a randomised, controlled, open-label, phase 3 trial
Stephen R. Russell,Jean Bennett,Jennifer Wellman,Daniel C. Chung,Zi Fan Yu,Amy Tillman,Janet Wittes,Julie Pappas,Okan U. Elci,Sarah McCague,Dominique Cross,Kathleen A. Marshall,Jean Walshire,Taylor Kehoe,Hannah Reichert,Maria C. Davis,Leslie Raffini,Lindsey A. George,F. Parker Hudson,Laura E. Dingfield,Xiaosong Zhu,Julia A. Haller,Elliott H. Sohn,Vinit B. Mahajan,Wanda Pfeifer,Michelle T. Weckmann,Chris A. Johnson,Dina Y. Gewaily,Arlene V. Drack,Edwin M. Stone,Katie Wachtel,Francesca Simonelli,Bart P. Leroy,Bart P. Leroy,J. Fraser Wright,Katherine A. High,Albert M. Maguire +36 more
TL;DR: Voretigene neparvovec gene replacement improved functional vision in RPE65-mediated inherited retinal dystrophy previously medically untreatable.
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A computerized method of visual acuity testing: Adaptation of the Early Treatment of Diabetic Retinopathy Study testing protocol
Roy W. Beck,Pamela S. Moke,Andrew Turpin,Frederick L. Ferris,John Paul SanGiovanni,Chris A. Johnson,Eileen E. Birch,Danielle L. Chandler,Terry A. Cox,R. Clifford Blair,Raymond T. Kraker +10 more
TL;DR: The computerized method has advantages over the S-ETDRS testing in electronically capturing the data for each tested letter, requiring only a single distance for testing from 20/12 to 20/800, potentially reducing testing time, and potentially decreasing technician-related bias.
Journal ArticleDOI
Incidence of Visual Field Loss in 20,000 Eyes and Its Relationship to Driving Performance
Chris A. Johnson,John L. Keltner +1 more
TL;DR: Automated visual field screening of 10,000 volunteers showed the incidence of visual field loss was 3.5% for persons aged 16 to 60 years but was approximately 13.0% for those older than 65 years, and follow-up results suggested that the most common causes were glaucoma, retinal disorders, and cataracts.