Ocular herpes occurs when the cornea is infected with HSV. It is the most common infectious cause of blindness in the us.

The measles virus causes a rash, cough, runny nose, eye irritation and fever, but it can also lead to ear infections, pneumonia, seizures, brain damage, and rarely, death.

The rubella virus causes a rash, mild fever and arthritis, but in pregnant women, it can lead to a miscarriage or birth defects, according to the CDC.