David M. Maurice, one of the most influential ocular physiologists of the 20th century, died July 20 at the age of 80. Dr. Maurice is perhaps best known for inventing the specular microscope, which allowed him to study living cornea cells. This was the first time the technique had been used in any discipline to approach in vivo biological problems, and modifications of his design are now used worldwide. His research career began at the Institute of Ophthalmology at the University of London, but eventually took him to academic centers on three continents. He joined the staff of P&S as a professor of ocular physiology in 1993. Dr. Maurice received numerous awards, including the Prentice Memorial Medal of the American Academy of Optometry.