Refractive and other Eye Surgery PRK (Photorefractive Keratectomy) ALK (Automated Lamellar Keratoplasty) RLE (Refractive Lens Exchange) PRELEX (Presbyopic Lens Exchange) Intacs (Intracorneal Ring Segments) Phakic Intraocular Lens Implants AK (Astigmatic Keratotomy) RK (Radial Keratotomy) Other Conditions & Procedures List Eye Injuries Treatments Corrective Lenses Eye Anatomy Diagnostic Procedures Vision Problems Eye Diseases