So, Mika and her kittens were taken to a shelter, and then your mom had them pulled back out?
I tell you what, you're a strong young lady, Spirita. I don't know if I could have handled that kind of irresponsible behavior from my parents at your age...I would have been beyond upset. And you know that I'm basing that from other things you've posted about your family regarding the welfare of your pets...
I'm not sure how you're determing how Sitka is blind. Is the eye simply closed, or is it open, and blue, or has a milky, white appearance? In any case, you need to buffalo your mother into providing these pets with veterinary care, and it she can't do so, then threaten to call animal control on her for neglect. She's done this far too many times, and I would be going out of my mind by now. It's WRONG, WRONG, WRONG. And if your mother cannot provide adequate medical care to your pets, then the pets must go.
I'm sorry, but she's being very selfish. Rather than putting the animal's best interest FIRST, she's more worried about her personal feelings. She was also incredibly selfish when she was leaving you to fend for yourself a little while back, and sneaking around with Bruce.
Sitka needs a vet. In fact, the entire litter needs to go for a general check-up, if it hasn't happened already. If she can't do that, I'd be calling animal control to have all of the pets removed, as painful and difficult as that will be. I hate to say it, but it's best in the long run for everyone.