Cornea is the clear front part of your eye. Diopter is the measurement of refractive error. When used in excimer refractive surgery, diopter is a measurement of the refractive power of the eye. Dry Eye is a common condition that occurs when the eyes do not produce enough tears to keep the eye wet and comfortable. Common symptoms of dry eye include feelings of stinging, burning, or scratchiness of the eyes.
Endothelium is the inner layer of cells on the inside surface of the cornea.
Epithelium is the outermost layer of cells of the cornea and is the eye's first defense against infection. Excimer laser is an ultraviolet laser used in refractive surgery to remove corneal tissue. Farsightedness is the common term for hyperopia. FDA is the abbreviation for the Food and Drug Administration. The FDA is the United States government agency responsible for the evaluation and approval of medical devices.