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Kayser–Fleischer ring
Kayser–Fleischer rings (KF rings) are dark rings that appear to encircle the iris of the eye. They are due to copper deposition in part of the cornea (Descemet's membrane) as a result of particular liver diseases.〔 They are named after Dr. Bernhard Kayser and Dr. Bruno Fleischer, the German doctors who first described them in 1902 and 1903. Initially thought to be due to the accumulation of silver, they were first demonstrated to contain copper in 1934.
==Detection==
As Kayser–Fleischer rings do not cause any symptoms, it is common for them to be identified during investigations for other medical conditions. In certain situations, they are actively sought; in that case, the early stages may be detected by slit lamp examination before they become visible to the naked eye.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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