I'm sorry to hear about your cats eye problems. I know how it is to have more than one sick cat. Last year all three of my cats caught an upper respiratory infection and the only place they had been was to the vet. Of course I couldn't prove that they caught it there. I sure hope that they get better and that the other two don't get it. It can get very expensive to have so many pets. I also have to go to the vet at least 3 times a year for my three. I take Storm in Jan., Sunny in April, and Pepper in July. Last year Pepper got so sick that he was constantly at the vet. Everyone knew him by name and they could even recognize my voice over the phone. It got to be almost embarassing. Well I've rambled on long enough. Good luck and please keep us updated on their condition.