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So we know that, according to the medical records, Ruby was blind at some point before her accident (which, depending on Ace's motivations, may or may not have actually left her deceased). It might be the condition she had since birth, or that could just be referring to something else.
Either way, I believe Ruby's flashback dream to her room indicates blindness. Her memory of the room is stark, lacking in visual detail, suggesting she was blind when she made these memories. There's a distinct, limited-range aura in which she's simply "aware" of her surroundings, rather than really "seeing" them. It's as if she only knows where and what these things are because she felt them.
On top of all of that, the biggest giveaway is the window.
She has no idea what's on the other side. For some reason, no matter how much she looks out the window, she can't see anything.