What causes herpes eye infections?
Herpes simplex virus-1 (HSV-1) is the most common herpes virus to affect the eyes. This is the same virus that causes cold sores on the lips.
Varicella-zoster virus (VZV; herpes zoster), which causes chickenpox in childhood and shingles in adulthood, can also affect the eye. Cytomegalovirus causes eye disease in immunocompromised people, such as HIV-infected patients with low T cell counts.