Hmm, that's a tough call, Tammy. I think if the eye cleared up you could consider her, but not without a vet's visit and okay. Here are a couple of things I found, don't know if they are relevant or not:
Herpesvirus (feline herpesvirus-1; FHV-1) can cause conjunctivitis ("pink eye") in the cat. Usually cats recover within 14 days of being infected, often without treatment. However, most cats, once infected with FHV-1, will harbor the virus long-term and about half of these "carrier" cats can experience recurrences later in life. Recurrent viral conjunctivitis can sometimes progress to viral keratitis (an inflammatory disease of the cornea, or outer clear shell, of the eye) and keratoconjunctivitis sicca (KCS), or dry eye. Cats may subsequently develop corneal ulcerations as well. Some cats develop chronic FHV-1-associated conjunctivitis, in which signs of the disease never go away.
There are many other reasons that a cat can develop conjunctivitis and discharge from the eyes. These include allergy, bacterial infection (especially with Chlamydia psittaci and Mycoplasma felis), fungal infection, and other viral infections (especially feline calicivirus), among other causes. Because of this, you will need to have your veterinarian examine your cat. He or she may want to perform other tests depending on what is found on physical examination.
The discharge may be composed of serous fluid with or without pus. When the discharge dries it appears as crusting around the eyes. The eyes are typically blood shot and the affected cat may or may not experience pain.
Affected cats are often treated with topical antibiotic eye drops. This medication is administered to prevent or treat secondary bacterial infections, including those caused by C. psittaci and M. felis, which often accompany FHV-1 infection. Sometimes systemic antibiotics are needed. In severe cases, especially in those that are recurrent or when KCS or chronic conjunctivitis is present, affected cats may also be treated with topical antiviral agents. Cats with KCS may also be given cyclosporine, an immune system suppressor, to attenuate the inflammation associated with this viral infection. Anti-inflammatory agents may be given if pain is present. Lysine, an amino acid, may help to speed recovery. Eyewashes are used to clean the eyes of the discharge.
I recommend that you have your veterinarian examine your cat so that appropriate treatment can be given. It is possible that this problem is not related to the herpes infection that your cat had earlier in life and should therefore be evaluated.
And:
In choosing a new kitten or cat, you should be careful to look for several things that indicate good health and temperament. First of all, the cat should have clear, bright eyes with little or no tearing, and the nostrils should be clean. Runny eyes, sneezing, or a nasal discharge can indicate a respiratory infection. The inside of the ears should be clean and free of any discharge. A black, tar-like discharge in the ear canal usually indicates an ear-mite infestation, while a pus-like discharge is often seen if there is a bacterial or yeast infection. The mouth and gums should be pink, with no evidence of ulcers or sores. The coat should be glossy, and there should be no bare spots, dry skin, dandruff, or any evidence of external parasites. The cat should not be too thin or have a protruding belly, since either condition can indicate the presence of internal parasites or some other medical disorder. If possible, make sure the cat has normal, well-formed feces.
The cat or kitten should be friendly and comfortable with people. A physically sound individual is active, bright, responsive, rambunctious, and eager to join in play. Beware of a cat that frequently runs and hides or sleeps more than normal.
Great that you're getting a new fur baby!
