Do you belong to the Yahoo Feline Herpes group? If not, you need to join and check out the stuff on eyes and what's worked for others who have herpes kitties with eye problems.
When we first got Hannah and she was deathly ill, we gave her Enisyl, but that got to be expensive, so we switched to plain ol' Lysine. I get the powdered stuff from the health food store and mix it in with her wet food. My vet recently told me to give Hannah 1000 mg/day, which is about 1/4 t twice a day. Lysine seems to be most effective when given in 8-12 hour doses, so twice a day is what I do. Also, when using Lysine, it can take up to a month to see results.
Stephanie