MedlinePlus Health Topics
disease topic
Patient-friendly
Corneal Disorders
Source: MedlinePlus Health Topics, U.S. National Library of Medicine
Last synced 8/10/2026Status: primary verified
Your cornea is the outermost layer of your eye. It is clear and shaped like a dome. The cornea helps to shield the rest of the eye from germs, dust, and other harmful matter. It also helps your eye to focus. If you wear contact lenses, they float on top of your corneas. Problems with the cornea include: Refractive errors Allergies Infections Injuries Dystrophies - conditions in which parts of the cornea lose clarity due to a buildup of cloudy material Treatments of corneal disorders include medicines, corneal transplantation, and corneal laser surgery. NIH: National Eye Institute
Educational only
This information is for general education and is not medical advice. Always talk to a licensed U.S. clinician about your situation, medications, or treatment decisions.