Master of Science, The Ohio State University, 2023, Vision Science

The purpose of this study was to survey sports vision practitioners to gather information on sports vision practice. The goal was to learn where opportunities are being found within sports vision and the details of practitioners' preferred practice patterns. Sixty-one sports vision practitioners answered questions on an online survey after providing informed consent. For those who answered the question regarding their profession, 87% were optometrists. The survey included multiple choice questions, along with a table of sports vision related tools. For the multiple choice questions, survey takers were asked questions about practitioner and athletic population demographics, sports vision assessment and training, and optical tints and nutraceuticals. Survey respondents indicated how often they employed each of the tools in the table. The number of responses for the multiple choice questions ranged from 42 to 61 and the number of responses per device in the matrix table range from 47 to 50. Devices in the matrix table were categorized three ways. Firstly, as analog and digital devices. Secondly, as devices that train the visual hardware versus visual software systems. Lastly, the devices were organized in a 4-tier system based on previously proposed hierarchical visual perceptual models. The survey results indicate that sports vision practitioners have found a wide range of opportunities to work with athletes across several sports and age groups as indicated by responses to questions about athletic patient population, characteristics of work with athletes, and about contracts with sports teams. The sports with athletes with whom the survey responders work (most commonly baseball, 71.15%) generally aligns with the published sports vision research, where baseball is the most studied population. There are discrepancies among the level of sport represented by the results of this survey (most commonly high schoolers, 75.4%) and the literature, where collegiate a (open full item for complete abstract)

Committee: Nicklaus Fogt (Advisor); Alexandar Andrich (Committee Member); Nicky Lai (Committee Member); Aaron Zimmerman (Committee Member) Subjects: Ophthalmology; Sports Medicine

Master of Science (M.S.), University of Dayton, 2011, Electrical Engineering

The current designs of color video projectors suffer from color errors commonly referred to as rainbow artifact. In this thesis, we propose new projector hardware and processing technique that reduce these artifacts signicantly. The hardware and preprocessing designs are tested in simulation by generating a video sequence that can be viewed on a 120 Hz monitor. Our contributions are in three parts. We first propose the notion of rendering error, or an error in the projected image perceived by the human visual system. We then propose spatial-temporal color wheel design incorporated the requirements for the zero rendering error condition and amplitude demodulation. The output was satisfactory, although it required a modied color wheel. Finally, we propose preprocessing scheme that reduce rendering error by introducing a correction term to cancel the predicted rendering error. This technique can be applied to traditional color wheels, and it was veried on RGB and RGBWW color wheels.

Committee: Keigo Hirakawa PhD (Committee Chair); Russell Hardie PhD (Committee Member); Eric Balster PhD (Committee Member) Subjects: Electrical Engineering; Engineering