This comment comes from subscriber Michael Breder's personal experience with an eye infection in one of his flock - it may prove helpful to other chicken folk.
"One of my 4 hens was not being herself when I came home from work and I found her in one of the nest boxes with her eyes gunked up. I immediately got her a bed in the nearest dog kennel quarantined on my porch and started calling my chicken support group. I spoke with one of my vet friends after hearing from many others that I should just dig a hole or eat her. My vet buddy said I had to get her eyes cleaned out with a warm wash cloth and get some neosporin in her eyes. He said to save the 15 bucks for terramycin at the feed store....turns out neosporin turned out just as good. Next day her eyes looked much better and she was on her way to recovery. I kept her in the dog kennel until she got her bearings and her appetite back. She is now back with the flock and it's a month later with no further problems. What looked like a possible sick chicken turned out to just be an eye infection...she is the rowdier of the flock and I think she just ran into something and hurt her eye. Just thought I'd share the story about the neosporin and getting her eyes cleaned out."