Don't worry about it. If she needs help, she'll probably ask. If she seems to be struggling, it's OK to offer; but don't feel like you have to. A blind person in college is likely to have it pretty together already, just to make it that far.

Other than that, Just try not to leave things where they could be tripped over or stepped on or sat on or whatever. My rule is generally if I step on something someone living with me left on the floor, and it breaks, it's there own fault for leaving it there. Pretty harsh, but I'm not going to walk gingerly around my own living room, or use a cane in my own house, in case someone left something out where it wasn't supposed to be. It sounds like you're in a university dorm, so I doubt you're going to be randomly moving what little furniture you have, so that's not going to be an issue. I have knocked over half-full drinks that people left unattended before, so I guess if you're in the habit of leaving half full cups of liquid sitting around, that might be something to be aware of. But if your dorm is anything like the usual dorm room, you've probably got your own desk and maybe your own dresser, and there's no reason your roommate would be feeling around for stuff on your desk, so odds are you're drinks are safe anyway.

The best advice in your case though is just to relax. Blind people have lived with sighted people all of our lives; we're pretty used to the process of working through whatever accommodations are needed. There might be a few awkward days as you adjust to one another, but it just isn't going to be that big of a deal. And yes, the process of adjusting does go both ways. If your blind roommate does things that drive you crazy, don't feel like you should hold it in, just because she's blind. She might not even be aware of the problem; as an example, I have a habit of using my laptop at all hours of the night. When I first was living in close quarters with someone, I had no idea I had my screen brightness up as high as it would go, and the light was so bright it was keeping the other person awake. I figured because I was being quiet, it was fine. If they'd only spoken to me sooner, they could have saved themselves a few sleepless weeks. I figured out where the brightness setting was, and actually got the screen to turn off completely. A win for them, because they could sleep soundly again, and a win for me, because my battery lasted like three times longer! Communication really is the key.

Fastfinge is spot on. I would just add try not to move her stuff or move around furniture without telling her. It may be a few awkward days of not knowing how to interact with each other, but it's like that with all new roommates. If you enter the room with friends and they say hi I would recommend mentioning their names each time. For example, "hey roomie, joe and Kelly are here with me" so she knows who is there and saying hi. If you see her around campus be sure to say your name when greeting her, out of context it can be hard to recognize voice (hi roomie, it's zombiecrusader).

Good luck with the new roomie!

As a visually impaired person with varying levels of vision, I was randomly assigned to live with my friend last year. She was well aware of how to handle the situation, but would often leave her shoes in the middle of the floor. Once I adapt to a space, I tend to not use my cane. I would always trip over her shoes, and I even got badly hurt a few times. The point is, try to keep everything in the same place as much as possible. You wouldn't believe how much impact the slightest movement of an object could have.
As for the personal aspect, treat your roommate like a normal person. So many individuals tend to treat visually impaired people differently, and sometimes it is too much. Asking for help is okay, just as long as it's not to the point where you are taking her independence away.
Be aware she may have some bulky equipment with her. I have a CCTV, used for magnification (not all blind people can see with this), but other equipment I have is equally bulky. Technology most likely will be a large part of her studies, especially voice activated software. Just wanted you to be aware of some of these things! Just relax OP. If she's a decent person, you two will be just fine!

I agree with what the others have said. Just treat her like you would any other person, she'll know what she does, and doesn't need.

Sighted person with a blind dad here, most of it has been covered already, but as I have lived in your exact situation for most of my life I thought I would throw in my two cents. Like others said, your going to have to be good about keeping stuff off the floor. More than you would expect most likely. Other things are if you're being very quiet and they don't already know youre there I tend to make some noise, say hi when they enter room, that sort of thing. Feel free to offer an elbow if youre headed to the same place. Try not to feel awkward about common phases, both of you know that "did you see that movie" isn't actually about seeing, and if you try to correct it, it makes something innocuous a little awkward. If youre going for a handshake or highfive etc, you gotta let them know. One of the ones I'm sure you already know but can take a little getting used to it that nodding and other visual queues that you dont even think about won't work, in general you're going to have to communicate verbally a bit more than you would with most other people. In the end of the day, I've never seen my dad be disabled in the sense that he is unable to do something, and while I can't speak for your roommate I imagine it will be similar. Oh, and if your roommate doesnt wear headphones very often you will get really good at understanding super fast talking.

edit: One other thing that I forgot that isn't mentioned here and it can be a biggie: Most blind people will look at you when they're talking to you, however obviously they won't make eye contact. I only mention this because it's such an important part of how sighted people interact with one another that we don't even really think about it. If your roommate seems closed off at first despite being perfectly friendly, try to pay attention to this and see if you're getting a false signal from the lack of eye contact.

Just ask! she will bring light to the situation!