Dr. McManus began his optometry career in Xenia. He then practiced in Cincinnati for three years before returning to Xenia to take over the practice of Dr. Gerald Troy, O.D. In 2008 Dr. McManus acquired the practice of Dr. Ernst Fischer in Enon, Ohio. Then in 2014 opened another location in Yellow Springs, Ohio.
He is licensed by the Ohio State Board of Optometry. He received his Doctorate of Optometry from the Illinois College of Optometry. He also obtained his undergrad degree in Biology from Carnegie Mellon University, where he played intercollegiate football.