Herpes Keratitis Causes
Type I herpes is very contagious and is commonly transmitted by skin contact with someone who has the virus. Almost everyone — about 90 percent of the population — is exposed to Type I herpes, usually during childhood.
After the original infection, the virus lies in a dormant state, living in nerve cells of the skin or eye. Reactivation can be triggered in a number of ways, including:
Once herpes simplex is present in the eye, it typically infects the eyelids, conjunctiva and cornea. It may also infect the inside of the eye; however, this is much less common.