Over time, disease or injury can damage the delicate innermost layer of the eye’s cornea, called the endothelium. This damage can cause the cornea to swell and become cloudy, leading to blurred vision. A way to restore vision when the endothelium is damaged is Descemet’s Membrane Endothelial Keratoplasty, or DMEK. DMEK is a partial transplant method that uses microscopic incisions to replace just the endothelial layer of cells, instead of the entire cornea.