Deformed Cory

So I went out and bought 2 more cories for my tank and when I got back to my room, I noticed that one of the cories that I bought is deformed. I didn't notice that the cory only had 1 eye. It didn't lose an eye I don't think, there's no sign of damage. The cory gets blind sided by other cories. I'm wondering if I should return this cory, I don't want it to be blind sided by the betta. The cory is very young and I'm not sure if deformities will shorten its life.

Should I return the cory or keep it?

I returned the cory because it wasn't getting along well with the other fishes (getting nipped) and got an albino cory.

My betta only tried to nip its fins, I noticed that the cory had a missing eye when it was in the bag. I tried it in the tank, but it wasn't getting along with the betta. My betta doesn't pick on other fishes unless it looks like its sick or dead and that cory appeared like that to the betta.