<prompt> Kayser fleisher ring is characteristic of?HemosiderosisWilson diseaseTyrosinemiaHereditary cataract  <response>: KANSWER: B Wilson diseaseREF: Khurana 4th ed page 181 410, Yanoff 2nd ed page 278Kayser-Fleischer rings are caused by copper deposits, and are indicative of Wilsons disease, whereas Fleischer rings are caused by iron deposits and are indicative of keratoconusIn Wilsons disease, an autosomal recessive disorder, defective copper metabolism develops as a result of a deficiency of the enzyme ceruloplasmin, A brown corneal ring, at the level of Descemets membrane Kayser-Fleischer ring, is characteristic, as is the development of a typical sunflower cataract. This is a disc-shaped polychromatic opacity in the pupil zone anteriorly, with petal-like spokes that extend toward the periphery.Kayser-Fleischer ring is a golden brown ring which occurs due to deposition of copper under peripheral parts of the Descemets membrane of the cornea. 