Allvar Gullstrand (1862-1930), Swedish ophthalmologist. He was professor (1894–1927) successively of eye therapy and of optics at the University of Uppsala. He applied the methods of physical mathematics to the study of optical images and of the refraction of light in the eye. For this work he received the Nobel Prize in Physiology or Medicine in 1911. He is noted also for his research on astigmatism and for improving the ophthalmoscope and corrective lenses for use after removal of a cataract from the eye.
See also: List of Swedish scientists