Fuchs dystrophy is a progressive, hereditary corneal disease which causes cells in the endothelium to gradually die off. Healthy endothelial cells remove excess fluids from the cornea. When these cells die, fluid buildup in the cornea causes swelling, resulting in cloudy or hazy vision. There are two stages of Fuchs dystrophy. In the early state (stage 1) vision may be affected upon first waking up, then improving throughout the day. In the later stage (stage 2) vision remains blurry or hazy throughout the day. Although current treatments can help relieve symptoms, Fuchs dystrophy is not curable.