The cornea is the clear dome shaped structure at the front of the eye. All light must pass through the cornea to the back of the eye (retina) to allow for good vision. The cornea is sponge like and soaks up fluid from the eye. The endothelium is the pump at the back of the cornea that pumps fluid out. In Fuch’s endothelial dystrophy the cells are unable to pump the fluid out and the cornea starts to swell leading to hazy vision. No treatment is required in the early stages but if vision worsens then the endothelial cells will need to be replaced, this is achieved with a corneal transplant.