You absolutely want to get to the vet as soon as you can. Possibly an antibiotic salve will help your dog. Could be an eye infection. Ring for a vet appointment as soon as you can. Good luckm and welcome to the forum!
what exactly does this matter in his eyes look like? is it redness, haziness, or pus looking stuff. conjuntivitis could be the issue, or it could be any number of eye diseases, such as pannus which is seen alot in the gsd. i would get him in for a diagnosis, treatment, etc.
There are a lot out there and some dogs do well on some and others don't.
Check out the Diet & Nutrition section just under this section.
Also my favorite website for food research is: http://www.dogaware.com/
Hope all goes well at the vet and happy food hunting!!
I have this great eye cleaner by HALO. I haven't had an issue yet that it didn't take care of! Rafi's poor eye was a mess a couple of weeks ago and I treated it 3 times in one day and then it was all better the next day!