I have been using the electrolyte supplement you mix in the water with my chicks (I got my chicks and the supplement at our TSC) and they are all doing well - they will be three weeks old on Monday.
I don't have experience with this myself, but I saw on another thread that if the eye is infected from being pecked (which is likely) you can get a terramycin ointment to put on it, probably from TSC. Until you get that you can use neosporin.
Other than that, all you can do is make sure...