Well, generally speaking, herpes can not lead to blindness. As we know that herpes are caused by some allergies and the bacteria. And you also should know that the herpes virus can spread from the eye's surface layers to deeper parts of the cornea. And also, active herpes virus in the eye can be contagious through close contact, bringing inflammation and scarring of the cornea. And some symptoms, such as irritation, sudden and severe ocular pain, cloudy cornea and blurry vision, sore and red eye, and headache can occur. But there is nothing to do with blindness. So you do not need to worry about it.