I wasn’t sure how to post a picture but the link below goes to a picture of the hens eye. I’ve never seen an eye look like this and her other eye looks completely normal. She is definitely blind or partially blind in the affected eye. I’m not sure if it’s an injury or if she is sick and could spread it to the other chickens.
https://share.icloud.com/photos/04dqqJVXzjApkXvTANA4UjORw
https://share.icloud.com/photos/04dqqJVXzjApkXvTANA4UjORw