Herpes Simplex Virus resides in the nerve centers of about 95% of the population. It is responsible for cold sores on the lips. When it activates in the eye, it can cause discomfort, decreased vision, pain, light sensitivity, and watering. HSV can reactivate during periods of stress or with extreme exposure to sunlight.
When HSV activates on the eye, we treat it with antivirals and watch very carefully for scarring and secondary inflammatory damage. It can be very serious and even cause blindness if mismanaged.