If you have a high level of farsightedness or nearsightedness and want to improve your eyesight, you may consider refractive lens exchange surgery (RLE). This is an advanced laser eye surgery for vision correction in which your natural lens is replaced with an artificial lens. Read on to learn more about the eye implant procedure. Necessary Tests Before Refractive Lens Exchange Surgery Imaging of the Cornea For RLE laser eye surgery, your doctor will take the images of your cornea and examine it. They will use the results to determine the best way to make the incisions to help solve your vision problem. Intraocular Lens (IOL) Then, they will determine the power of the intraocular lens, also referred to as ...