Alkaptonuria is a rare inborn error of metabolism with autosomal recessive inheritance with a mutation in homogentisate 1. 2-dioxygenase. It results in accumulation of homogentisic acid in connective tissues (ochronosis). Most common ocular manifestations are bluish-black discoloration of the conjunctiva. https://hollandscountryclothinges.shop/product-category/tweed-ponchos/