[shane]

I’ve done a bit of searching and found that there’s a condition in guinea pigs called fatty eye or pea eye which looks the same. It’s the result of the conjunctival tissue around the eye being swollen or enlarged. It seems to be a common hereditary condition in guinea pigs but could be cause by an infection, teeth problems etc. I also saw a forum post saying that it’s becoming increasingly common in dwarf hamsters.

I would guess that if the eyes have always been like that it’s hereditary and nothing to worry about, but I’d certainly contact a vet if it developed suddenly.