Stephen Trokel

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Stephen L. Trokel (* 1934 ) is an American eye surgeon . He developed the laser corneal correction ( photorefractive keratectomy , PRK).

life and work

He graduated from Cornell University with a degree in physics, received his master's degree in radiation biology and his doctorate in medicine from the University of Rochester , New York. He also received his doctorate in ophthalmology from Columbia University .

Excimer lasers were available from 1977 . 1983 developed Trokel with the IBM physicists Rangaswamy Srinivasan , the concept, the cornea ( cornea ) with an argon - fluoride edit excimer laser. The ultraviolet light of the excimer laser concentrates the entire energy on the corneal surface, where the cell layers are ablated one after the other without heating.

Through such a change of the refractive power of the cornea, it is possible refractive errors compensate. To correct myopia , the cornea is flattened primarily by means of a central ablation; to treat hyperopia , it is lasered steeper by means of a ring-shaped ablation in the periphery of the cornea.

Common refractive surgery procedures that use the excimer laser today are LASIK , PRK, LASEK and Epi-LASIK .

After the collaboration with Srinivasan ended, Trokel applied for a patent on the joint discovery without his knowledge. After a legal dispute, the patent was therefore declared invalid.

In 2008 Trokel was inducted into the ASCRS Ophthalmology Hall of Fame and was awarded the Rank Prize in 2010 .

Web links

  • Stephen L. Trokel, MD Department of Ophtalmology, Columbia University(English).;

Individual evidence

  1. ↑ Stephen Trokel: Vascular physiology of the eye . 1965, OCLC 56154818 (Doctoral Thesis (Med. Sci. D), Columbia University, College of Physicians and Surgeons, 1965).
  2. ^ John D'Angelo: Ethics in Science: Ethical Misconduct in Scientific Research . CRC Press, 2012, ISBN 978-1-4398-4086-3 , Rangaswamy Srinivasan - VISX patent dispute (English).
  3. ^ Honoree: Stephen L. Trokel, MD. American Society of Cataract and Refractive Surgery, accessed November 28, 2018 .
  4. ↑ THE RANK PRIZE FUNDS PRIZEGIVING 8 FEBRUARY 2010. The Rank Prize Funds, 2010, accessed on November 28, 2018 (English).
personal data
SURNAME Trokel, Stephen
ALTERNATIVE NAMES Trokel, Stephen L.
BRIEF DESCRIPTION American eye surgeon
DATE OF BIRTH 1934