Dr. Robert B. Mandell has had a distinguished career as a clinician-scientist, educator and innovator, with over 50 years of contributions to the field of contact lenses and corneal physiology. Beginning in 1960 to 1974, he published a series of eighteen papers on the measurement of corneal topography and built several instruments to measure corneal topography, including a small-mire keratometer and several photokeratoscopes including a portable design, which he used to study animal and human infant corneas. Mandell also made many contributions to the physical and optical design of contact lenses. He studied the effect of different edge shapes on lens comfort, simplified the calculation of lens power, demonstrated how prism power in a contact lens was the same on the eye as it was in air, designed the first one-piece monocentric bifocal lens, simplified toric lens calculations, designed unique lenses for keratoconus and many other clinical innovations. Altogether, in his career he had 159 publications in professional journals. Mandell is best known for his classic text, Contact Lens Practice, first published in 1965 and reprinted 14 times in 4 editions, with the last in 1988. Mandell used his book to introduce many of his unpublished experiments and concepts. He collected information from nearly 3,500 publications for its preparation, which helped to make it the standard reference source in the field of contact lenses.