As an ophthalmologist and surgeon In 1960, Kelman started an ophthalmology private practice. In the fall of 1962, he began to experiment with the use of
cryosurgery. His first invention in the fall of 1962 (and published in January 1963) was an ophthalmic cryoprobe which used liquid nitrogen, which he used to freeze a cataractous
lens before removal in
intracapsular cataract extraction (ICCE), which removed the lens with the
capsule intact. Kelman's cryoprobe using liquid nitrogen offered advantages over the cryoprobe which used carbon dioxide which was used for cataract extraction and had been published by Tadeusz Krwawicz in the British Journal of Ophthalmology on April 1, 1961. Kelman named the procedure
phacoemulsification, a technique that has become standard treatment for cataracts. His first patient's eye became infected and was removed. However, he was successful on subsequent attempts. Kelman began a novel business relationship with the manufacturer to produce the device. After publishing "Phaco-emulsification and Aspiration—A New Technique for Cataract Removal: A Preliminary Report" in the
American Journal of Ophthalmology, he began teaching courses to surgeons interested in learning this new technique. Kelman's developments allowed the incision necessary for ECCE to be reduced from to and minimized recovery time. This new surgery method removed the need for an extended hospital stay and made the surgery less painful. The technique and similar tools have also been adopted and used in neurosurgery to remove tumors from the brain and
spinal cord, and subsequently ushered a trend of minimally-invasive outpatient surgical procedures. this issue was only overcome when Thomas R. Mazzocco invented the silicone IOL in the early 1980s. What became known as the "Mazzocco taco" could be folded and inserted in the same small incision used for phacoemulsification. When the foldable IOL was approved for use by the
Food and Drug Administration in 1984, the clear advantage of Kelman's phacoemulsification was fully realized. Kelman treated many celebrities including
Joe Frazier,
Lionel Hampton,
Rex Harrison,
Ann Miller,
Jan Peerce, and
William B. Williams.
Hedy Lamarr, who Kelman treated in October 1980, said "I was blind for more than seven years. But I'm fine now. Dr. Kelman gave me my sight back. He gave me my eyes." In 1992,
The New York Times estimated that Kelman's innovation "shaved $7 billion a year from the nation's hospital bill." as well as a lay book,
Cataracts: What You Must Know About Them, published by Crown Publishers in 1982. Later in his career, he invented a way to create
collagen from a patient's skin to avoid allergic reactions. He continued to practice medicine, perform surgery, and teach alongside his career as an entertainer. Cataract surgery with phacoemulsification is one of the most common surgeries in the world with more than 9.5 million such procedures performed each year around the world as of 2011.
As an entertainer Kelman began composing music in high school he developed a musical comedy routine which he also performed in Atlantic City and Las Vegas, opening for or performing alongside
the Spinners,
Glen Campbell,
James Darren,
Dizzy Gillespie,
Lionel Hampton and
Regis Philbin. Kelman co-produced several musicals on
Broadway, including
Can-Can (1981),
Triumph of Love (1997), and
The Sound of Music (1998–1999), and was a member of the
Friars Club in New York. == Awards and honors ==