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Cornea is a five-layer transparent structure of the human eye, which is necessary for clear vision.

There are several causes of corneal injures and ulcers. For example, a direct hit on face may result in tissues on the cornea. Besides, some small pieces of substance may damage the cornea when it got into one’s eyes. In addition, certain chemicals are also dangerous for our cornea. What’s more, cornea are so weak that even the dust may become a threaten to it when one rub his eyes. In all, there are varies causes for corneal injuries and rules.

The injury cause in those conditions discussed above can pose a long-term problem. It may lead to ulcer or leave a small area of scar tissue after it heals. Although tissue and ulcer around the cornea may be less harmful to our vision, they will interfere with vision when they occurs at the center of the cornea. Moreover, the symptoms of a corneal injury include eye pain, sensitivity to light, bloodshot eyes, a feeling that something is in the eye, blurred vision, and possibly a white spot on the cornea.

To treat these problem, corneal grafting, which transplant corneal tissue from one human eye to another. To deal with keratitis, patients need antibiotics, artificial tears and eya peath.