Main Menu Back to Corrective Procedures About Eye Care Professionals Corrective Eyewear Prescription Drugs & Supplements Preserving Your Sight Vision Insurance Eye Diagram Glossary   Our Other Sites Bookstore Directory Other Resources Statistics Vision Loss and Blindness Resources Search All Sites Site Map Corrective Procedures - Corneal Ring Segments Corneal ring segments are tiny, clear crescent-shaped pieces of plastic polymer that are implanted in the cornea. The ring segments reshape the cornea so that it becomes flatter, allowing it to focus light rays onto the retina and producing sharp vision. The procedure takes about 15 minutes and is done on an outpatient basis. Before surgery, anesthetizing drops are placed in the eyes. In 1999, the FDA approved it as a non-laser surgical procedure for correcting small amounts of nearsightedness. Corneal rings are still being studied to treat mild hyperopia and astigmatism, although these uses have not been approved by the FDA. Several other intraocular and corneal implants, from several companies, also are in various stages of clinical study. All brands and product names are trademarked or registered trademarks of their respective companies. Copyright of syndicated content belongs to it’s respective author or news organization. Original content (including "look and feel") Copyright © 2001-2006  •  Vision Loss and Blindness Resources  •  All rights reserved.