Hamster has one red eye, one black.

[heidii]

A couple rescue hamsters came to me today, though they likely won't stay long at all as I do already have homes for them.
I did notice however that one of the hamsters had one black eye, and the other is red. There is no swelling or discharge, and it looks like a totally normal red eye. They were cohoused so I am not sure if it could be a trauma related incident, I am just confused by the fact that the hamster seems absolutely fine & alert despite the eye. I saw online that it is quite rare, and pet store hamsters are unlikely to have this. I will take him to the vets soon to get him checked, but I just wanted some of your opinions.

The white one is 56g and the other brother is 66g, so quite chunky little boys. The owners had removed the wheel as "there wasn't much space to run with it in there".

Sorry for the image quality, I only got them a few hours ago and took pictures as the cage was being cleaned out. black eye, red eye, the brothers