Aug 6, 2025 · The cornea is the clear outer layer at the front of the eye. There are several common conditions that affect the cornea. Read about the types of corneal conditions, whether you are at risk …

Dec 6, 2024 · It happens when a type of corneal cells called endothelial cells move from the cornea into the iris (the colored part of the eye). When these cells move, they can block eye fluid from draining …

Dec 6, 2024 · Corneal dystrophies are eye diseases that involve changes in the cornea (the clear front layer of your eye). Learn about keratoconus, Fuchs’ dystrophy, lattice dystrophy, and map-dot …

Jun 26, 2019 · National Eye Institute (NEI)-supported researchers are always working to better understand, diagnose, and treat conditions that affect the cornea (the clear front layer of the eye). …

Sep 4, 2025 · If you have severe damage to your cornea (the clear front layer of your eye), doctors can replace the damaged part with healthy corneal tissue from a donor. Read about what happens during …

Aug 6, 2025 · Dry eye happens when your eyes don’t make enough tears to stay wet. Learn about the symptoms, causes, diagnosis, and treatment of dry eye.

Browse or search our resources about dozens of eye conditions and diseases. Get the basics about symptoms, diagnosis, and treatments — or go in depth to see all the details.

Sep 17, 2024 · This malformation causes the edge of the eyelid to draw inward, so that eyelashes scratch the eye. If left untreated, trichiasis can result in corneal clouding, and eventually blindness. …

Nov 26, 2025 · A cataract is a cloudy area in the lens of your eye. More than half of all Americans age 80 and older either have had cataracts or have had surgery to get rid of cataracts. Learn about the …

Dec 4, 2024 · Astigmatism is a common eye problem that can make your vision blurry or distorted. It happens when your cornea (the clear front layer of your eye) or lens (an inner part of your eye that …