Possibly a blind guinea pig?

I rescued a guinea pig yesterday. He came from the Humane Society (the only place I could get one other then PetSmart, and another local pet store, that mixes males and females that didn't require me to travel hours to get to). The vet wasn't sure how to treat cavies, so didn't give much of a checkup to him at all, so they couldn't really say anything.

I didn't notice much yesterday, but today, I was giving him some lettuce and dandelion greens, and he didn't even seem to notice them until I put his nose right up to it and he smelt it. Also, when I was trying to pick him up out of the cage, he didn't seem to notice me until I touched him. I put my hand in front of his face, and he didn't even flinch or make any attempt to move until I pet him, then he freaked out. My mom done what I've seen almost everybody does, flinching your hands towards his face, and he didn't blink or move, he seemed oblivious.

His eyes don't look cloudy or anything, as blind eyes usually are.

http://www.petfinder.com/petdetail/21513246 (his Petfinder page). You can see his eyes look normal and alert.

We're taking him to the vet later this week. I just wanted to hear thoughts first. He doesn't seem to be too effected so my family decided to wait until this semester's over or else it'd be sooner.

Thanks!