Other colours would be possible as well, such as purle. But it's as unusual among them as it is in humans. Brown eyers are probably pretty common, it's like a paler orange anyway^^.
Blindness is one of the most common birth "defects" I've made up for them, I don't think I ever updated with the info on common causes of death, normal lifspan and common problems with their genetics such as blindness and dwarfism. It's not something that happend frekvently but I thought I should give them some problems.
If I happen to make more smilis for adoption later on I coule make a white eyed one for you to fight over^^. Thanks for the idea. If you have any other ideas please tell me so I can steal use them for adoptables.
Sorry to hear you might be getting rid of Izzy, Lori. I don't think I could take her though. She reminds me so much of you that it'd feel strange I think.