Our youth Pastor has an ulcer in the cornea of his eye. Do you know if Eyebright may help, or have any suggestions on what can? His eye has been bugging him for a week. He's currently taking antibiotics. I'm going to offer him some pau d' arco in the meantime.

The eyebright will help to an extent.  If there is an infection then the eyebright should be combined with an antiseptic tea such as the pau d' arco or I generally recommend the chaparral.  For the most part though it will just take a little time to heal.