Did you know that Allvar Gullstrand was born today in 1862? He was an ophthalmologist. Ophthalmology is the study of the eye and the treatment of eye disorders. Allvar Gullstrand studied the structure of the eye, especially the cornea. The cornea is made of transparent tissue and covers the iris, pupil and lens. It is one of the structures that focuses the light that enters the eye. Allvar Gullstrand used math to describe how light is refracted, or reflected and changes direction, in the eye. In recognition of this work, Allvar Gullstrand was awarded the Nobel Prize in Physiology of Medicine in 1911.
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Allvar Gullstrand developed a lamp that could create a focused beam of light. Used along with magnifying lenses, doctors could study the interior of a patient’s eye in detail. This diagnostic tool is called a Gullstrand slip lamp and is still used today in most eye exams.
LASIK surgery helps to correct vision by reshaping the cornea.