High Quality Content by WIKIPEDIA articles! X-linked endothelial corneal dystrophy (XECD) is a rare form of human corneal dystrophy described first in 2006. IT is manifested as corneal clouding in the form of a ground glass, milky corneal tissue, and moon crater-like changes of corneal endothelium. HUman corneal dystrophies is a group of disorders, characterised by a noninflammatory, inherited, bilateral opacity of the transparent front part of the human eye called the cornea. THere is a number of rare forms varying in expression and degree of vision loss. THe International Committee for Classification of Corneal Dystrophies (IC3D) was established in 2005 and created a new classification system employing the latest data of molecular biology an genetics.