Soccorro: My grandma might become blind :(
Sorry to hear that. Mine is also blind - in my grandma's case it's a good thing, though, because it keeps her from acting out all the insane ideas her schizophrenia gives her... uhm, what I actually meant to say: even if she went blind, it's not the end of the world. My grandma learned to take care of herself despite being a nutjob. Also evil. Incredibly evil. Of course it takes a lot of support from the family but presuming that your family actually likes your grandmother everything's gonna be fine.
Also, what's the issue anyway? A cataract ("Grauer Star")? If so, that stuff is very treatable via medication and surgery.
Edit: Oh yeah, what I actually came to this thread for (but totally forgot about because a loved one going blind is infinitely worse): after someone's recent attempt to reset my Steam password today I discovered that I had lost access to my Origin account - client wasn't able to log in anymore, password wasn't recognized, password recovery didn't work. Support first wasn't able to help me, for a second it even seemed that they had messed up and made things even worse and told me to call the hotline - an hour after the chat I got access again, though, using my same old password that had been refused dozens of times for several hours. I don't know whether the support guy fixed the issue after our chat, maybe it was just some weird server issue (which oddly enough only affected this one account - other accounts worked and support was also able to make the system send me an email to my correct address which didn't help me regain access, though), but still I'm freaking out with all the scamming and phishing going on lately...