Well, generally speaking, oil of oregano can not help your eye infection. As we know that infections commonly occur in the tissues that cover the white front surface of your eye. And at that moment, we call an infection as conjunctivitis. Of course, it may occur from viral infections like the common cold, but on the other hand, bacteria and fungi may also cause eye infections too. You may think oregano oil can do a good job to the eye infection, because it helps treat conditions such as asthma and rheumatoid arthritis. But, you also should know that even if they have some potential health benefits, oregano oil has no direct link as a treatment for an eye infection. Anyway, for eye infection, the first thing you should do is to find out the causes of your infection.