Swedish ophthalmologist (1862–1930)

Gullstrand, a physician's son from Landskrona, Sweden, was educated at the universities of Uppsala, Vienna, and Stockholm, where he obtained his PhD in 1890. After working briefly at the Karolinska Institute in Stockholm Gullstrand moved to the University of Uppsala, where he served as professor of ophthalmology from 1894 until his retirement in 1927.

In 1911 Gullstrand was awarded the Nobel Prize for physiology or medicine for his work on the dioptrics of the eye. Hermann von Helmholtz had earlier shown that the eye solves the problem of accommodation (how to focus on both near and distant objects) by changing the surface curvature of the lens – the nearer the object, the more convex the lens becomes; the further the object, the more concave the lens. Gullstrand showed that this could in fact account for only two thirds of the accommodation a normal eye could achieve. The remaining third was produced by what Gullstrand termed the ‘intracapsular mechanism’ and depended on the fact that the eye was not a homogeneous medium.

For more information on Allvar Gullstrand, visit Britannica.com.

(äl'vär gŭl'stränd) , 1862–1930, Swedish ophthalmologist. He was professor (1894–1927) successively of eye therapy and of optics at the Univ. 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 1911 Nobel Prize in Physiology or Medicine. 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.

(gŭl'strănd'), Allvar 1862–1930.

Swedish ophthalmologist. He won a 1911 Nobel Prize for his study of the dioptrics of the human eye.

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