We adopted Oliver and Basil 2 months ago from a rescue and Ollie, age 3, had an eye infection at the time. It turned out to be conjunctivitis and spread to both eyes. I too was concerned about getting a sickly cat, especially as he then developed an infection in his glands! The poor cat went to the vet 3 times in his first 2 weeks and, had to tolerate me giving him pills and eye drops. However, he has recovered well and does not seem to bear me a grudge so, if you like the cat, just go for it! Good luck.