She can create illusions, yeah. Or more accurately stated, she can create virtual images at will by bending light and imagining what she wants to see. She carries the mirror and glasses with her to help her if she's having trouble focusing it. In theory, she could even concentrate light in one area and use it like an energy blast. It's also possible for her to block all light from interacting with her, essentially making her invisible. I really love the possibilities of light manipulation ^_^ 

But there's no way she's strong enough to do all that yet :P