In 1947, he began his scientific career in Carl Gustaf Bernhard's laboratory at the Karolinska Institute, where he received his medical degree in 1954.

In 1983, Wiesel joined the faculty of Rockefeller University as Vincent and Brooke Astor Professor and head of the Laboratory of Neurobiology.

[10] At Rockefeller University he remains co-director of the Shelby White and Leon Levy Center for Mind, Brain and Behavior.

These kittens also did not develop areas receiving input from both eyes, a feature needed for binocular vision and stereopsis.

[citation needed] He also holds the following awards and honors: In 2001, Wiesel was nominated for a position on an advisory panel in the National Institutes of Health to advise on assisting research in developing countries.

In addition to Wiesel, Thompson's office rejected another 18 (out of 26) nominations and in return recommended other scientists that whistleblower Gerald Keusch described in an interview as "lightweights" with "no scientific credibility".

This incident was cited by the advocacy group Union of Concerned Scientists as part of a report detailing their allegations of abuse of science under President George W. Bush's administration.

[23] In 2006, he was awarded the Ramon Y Cajal Gold Medal from the Spanish National Research Council (CSIC - Consejo Superior de Investigaciones Cientificas).

[citation needed] In 2009, Wiesel was awarded the Grand Cordon Order of the Rising Sun Medal in Japan.

He is a founding member of the Israeli-Palestinian Science Organization, a nongovernmental nonprofit established in 2004 to support collaborative research between scientists in Israel and Palestine.