
I have had two litters of Persian kittens born with their eyes open. This was many years ago. Sadly they were all blind. With the first litter, one of them had to be put to sleep as it couldn't cope, but the other two managed fine and I found them homes, but I had the second litter put to sleep. With the first litter I was hoping that they would be ok as I hadn't come across it before, but sadly it wasn't. I don't know what caused it, but it was around the time of the Chernobyl incident and I lived on the coast of East Yorkshire where a lot of lambs were born like this too. Or it could have been due to a mating that wasn't well matched as the queens were related (mother & daughter) and I used the same stud for both. I had them neutered after this.
What I would say is get some artificial tears from the chemist and keep putting them in as often as possible and most definitely keep it in the dark. At least it has only one open so maybe if it is blind it will only be in one eye. Perhaps you could cover the eye with something to keep it dark.
Liz