<prompt> KF ring is seen in -ChalcosisDiabetes mellitusKeratoconusAnterior Uveitis  <response>: Ans. is a i.e., Chalcosis Chalcosiso Chalcosis is perforating injury to eye with metal containing copper Cu. o Copper deposition can lead toi Grayish-greengolden brown discoloration of peripheral cornea called Kayser-Fleisher ring.ii Sunflower Petal of flower cataract due to deposition of copper under the posterior capsule of the lens.iii Golden plaque at posterior pole of the retina. 