Johan Thomas Zwaan, MD, Ph.D.

Johan Thomas Zwaan

Title: Clinical Professor of Ophthalmology
Company: University of Texas School of Medicine at San Antonio
Location: San Antonio, Texas, United States

Johan Thomas Zwaan, MD, Ph.D., Clinical Professor of Ophthalmology at the University of Texas School of Medicine at San Antonio, has been recognized by Marquis Who’s Who Top Educators for dedication, achievements, and leadership in ophthalmology and higher education.

Drawing upon more than five decades of industry experience, Dr. Zwaan has demonstrated versatility and professional prowess in his field, having most recently served as a clinical professor of ophthalmology at the University of Texas School of Medicine at San Antonio from 1996 until his retirement from the industry in 2017. Prior to this illustrious appointment, he was the senior academy consultant in ophthalmology at the King Khalid Eye Specialists Hospital in Riyadh, Saudi Arabia, from 1994 to 1997, a professor of ophthalmology, cellular biology and pediatrics at the University of Texas School of Medicine at San Antonio from 1989 to 1994, and an associate professor of anatomy and ophthalmology at Harvard Medical School in Boston, MA, from 1971 to 1989. He commenced his career as an associate professor of anatomy at the University of Virginia in Charlottesville, VA, in 1964.

Dr. Zwaan felt compelled to pursue the field of medicine from a formative age, having been inspired by his family members, who were all physicians and nurses. Attending the University of Amsterdam, he received a Doctor of Medicine and Doctor of Philosophy in 1960 and 1963, respectively. Thereafter, he immigrated to the United States and completed a postdoctoral research fellowship at the Johns Hopkins School of Medicine in Baltimore, MD, from 1963 to 1964. He also completed a residency at the Albany Medical Center in New York. He is a diplomate of the American Board of Ophthalmology and a fellow of the American Academy of Ophthalmology.

Alongside his primary career endeavors, Dr. Zwaan formerly served on the study section of the National Institutes of Health in Bethesda, MD, in the mid-1970s and was a senior examiner for the Arab Board of Ophthalmology in Damascus, Syria, in the mid-1990s. Desiring to share his wealth of knowledge with the medical community, he acted on the advisory board of the Preventive Blindness Foundation in San Antonio, TX, from 1992 to 1994. Likewise, he has also contributed 80 peer-reviewed papers and more than 200 chapters to various publications throughout his career, having been the author and editor of the first three editions of “Decision Making in Ophthalmology” between 1992 and 2014 and the revised third edition of “Ophthalmology: Ambulatory Pediatric Care” in 1999.

In an effort to remain abreast of recent developments within the industry, Dr. Zwaan has maintained affiliation with numerous professional organizations. He is a member of the American Association for Pediatric Ophthalmology and Strabismus and the American Society of Human Genetics, as well as a lifetime member of the Reserve Officers Association and the Association of Military Surgeons. Earlier in his career, he served as a colonel in the Medical Corps of the United States Army Reserve, having also been drafted into the Royal Netherlands Army for two years.

In recognition of his exceptional contributions to the field of ophthalmology, Dr. Zwaan was the recipient of the Research Career Development Award from the National Institutes of Health from 1972 to 1975 and has been a grantee of Fight for Sight and the National Science Foundation. Married with five children and four grandchildren, he enjoys writing, photography and gardening in his spare time.

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