Allvar Gullstrand was a Swedish ophthalmologist, optician, and recipient of the 1911 Nobel Prize for Physiology or Medicine for his research on the eye as a light-refracting apparatus.

Gullstrand was born on 5th June 1862 at Landskrona, Sweden. He studied in Uppsala, Vienna, and Stockholm, earning a doctorate in 1890. He became a professor of diseases of the eye at Uppsala in 1894 and in 1913 was appointed professor of physiological and physical optics there. Gullstrand contributed to the knowledge of the structure and function of the cornea and to research on astigmatism.

He was elected a member of the Royal Swedish Academy of Sciences in 1905 and served on the Academy's Prize Committee for Physics. Malagasy Postal Department honors this distinguished scientist to recognize his contribution to humanity. He is shown with Willem Einthoven, who received the Nobel Prize for Physiology or Medicine in 1924.

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