Medical Dictionary

Stiles–Crawford effect

noun Stiles–Craw·ford effect \ˌstīlz-ˈkrȯ-fərd-\

Medical Definition of Stiles–Crawford effect

  1. :  an optical phenomenon in which light passing through the center of the pupil is perceived as more intense than light passing through the periphery of the pupil

Biographical Note for stiles–crawford effect



Walter Stanley

(1901–1985), and



Brian Hewson

(1906–1991), British physicists. Stiles spent almost all of his career as a research scientist at the National Physical Laboratory in Great Britain. He was the author of numerous papers on illuminating engineering and physiological optics. He published book-length studies on thermionic emission (1932), the science of color (1967), and the mechanisms of color vision (1978). In 1933 Stiles and Crawford, a fellow researcher at the National Physical Laboratory, published a paper on the optical phenomenon now known as the Stiles-Crawford effect.

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capable of being understood in two ways

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