from Wikipédia, March 26, 2013

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La mydriase caractérise une augmentation du diamètre de la pupille, à l’opposé du myosis.


La mydriase est une réaction normale à la pénombre. Elle est dans ce cas bilatérale et réactive (l’éclairage d’un œil entraîne la régression de la mydriase des deux yeux). Cette réaction (et son contraire) nécessite l’intégrité d’un circuit comprenant :

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Medical Condition Eyes and Vision Dilatation Disease Brain and Nerves
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