He never made much money in optometry.
Influential audio engineer Rudy Van Gelder, who died Aug. 25 at age 91, worked as an optometrist for a decade before switching to the music business full time, The New York Times reports in an obituary. The article says Van Gelder, who engineered albums by jazz greats including John Coltrane, Miles Davis, Herbie Hancock and Sonny Rollins, attended the Pennsylvania College of Optometry in Philadelphia and worked as a recording engineer in his spare time while practicing optometry during the day. "I never made much money while practicing optometry after college," the newspaper quotes him as saying. "I made more from making records."