Sasha is blind, yet she wears a watch. mmm why? *spoiler*

I've just watched this movie a couple of hours ago and i haven't seen anyone mention this yet(so far). I've been suspicious of her character ever since the begining when i noticed that.

a) Sasha is a blind girl and she is wearing a watch. This is not logical.

b) She is Alexandra Trust(Trusk), said she ran into the cube to escape IZON.
If she was blind, how did she know where the entrance to the hypercube was?
(We saw the exit to it in the end, I would be likely to think it's the entrance also)The place is not easy to get by.

c)Sasha is known to crash the stock exchange and the likes. How do you hack efficiently when you are blind?

I'm just really thinking that Sasha was not blind at all through the whole movie. But faking it until her death...or something..

This keeps coming into my mind. maybe someone else though the same =]