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H. STANLEY THOMPSON, MAURICE W. VAN ALLEN, GUNTER K. NOORDEN; The Pupil in Myotonic Dystrophy. Invest. Ophthalmol. Vis. Sci. 1964;3(3):325-338.
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The pupils of 15 patients with myotonic dystrophy were examined with the electronic pupillograph of Lowenstein and Loeioenfeld. They were found to have round, equal, miotic pupils which reacted sluggishly to light and to near vision. The studies showed no defect of the sympathetic pathways. Pupillary fatigue was comparable to the normal. Various locations for a defect causing this combination of pupillary abnormalities are discussed. The midbrain is suggested as the most likely location.
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