What are the causes of corneal ulcer?
A corneal infection occurs when bacteria are able to gain entry to the cornea through a scratch or breakdown on the surface of the cornea. In some cases they are caused by failure of the eyelid to close as it should. Sometimes acid or caustic thrown on the face can also damage the cornea by causing a chemical burn and ulcer.This can lead to infection and further cause damage to thin membrane of the cornea. With the use of extended wear disposable contact lenses, corneal ulcers have become more and more common. Tiny corneal tears may also cause corneal ulcers. These tears can come from direct trauma, scratches, or particles such as sand, glass, or small pieces of steel. Such injuries damage the cornea and make it easier for bacteria to invade and cause a more serious ulcer. Disorders that cause dry eyes can leave your eye without the germ-fighting protection of tears and cause ulcers. Disorders that affect the eyelid and prevent the eyes from closing completely, such as a nerve paralysi
