Bernard Syndrome

Information and facts about Eponymous diseases.

Horner's syndrome is a set of symptoms on one side of the face suggesting damage to the sympathetic nervous system. It consists clasically of ptosis (drooping upper eyelid), myosis (constricted pupil) and endophthalmus (the impression that the eye is sunk in compared to its counterpart). Anhydrosis, decreased sweating, may be present on the affected side (as this is mediated by the sympathetic nervous system).

It is named after Dr Johann Friedrich Horner (1831-1886), the Swiss ophthalmologist who first described the syndrome in 1869. Several others had previously described cases, but "Horner's syndrome" is most prevalent. In France, Claude Bernard is also eponymised with the condition being called "syndrome Bernard-Horner".

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