I totally agree with David, here, regarding the inanity which is "blind Falmer" in this game. The game insists that the Falmer are "blind". Not "almost blind", or "partially blind", or "a little bit blind", or "a whole lot blind", but, simply, b.l.i.n.d. There's no ambiguity, there. This is an in-game fact. Another in-game fact, that is completely at odds with this one is that the Falmer act precisely like sighted persons.
Now, one of my best friends, years ago, was blind. There was a very good reason that in her home every thing had its place and no place that was not supposed to have a thing ever ... EVER ... had a thing. A single out-of-place object could have spelled disaster for her. Want to up the anty a bit? She was blind from birth. She had an uncanny sense of hearing, and could "echo-locate" by making clicking sounds with a little device she carried in one hand. It still wasn't good enough to let her know about small objects that might be in the way.
Now, about those presumably "blind" Falmer. I can have Sneak maxed out. I can move silently, even have shoes that muffle my sound. I don't make any discernible sound ... at all. I fire an arrow at a blind Falmer archer (now, there's an oxymoron if I ever saw one), and then step to the side. What does my opponent do? Exactly what a sighted opponent would do. He re-aims and fires his arrow in my precise direction.
Ever notice how when you fire an arrow to distract your opponents that they go into this odd back and forth searching motion, trying to locate the disturbance? First of all, real people under fire don't do that. They duck for cover and, guess what? They LISTEN. Animals do that, too. I guess the developers have never been in a real fire-fight. I have. You don't go into a stupid mini-patrol sequence when there's someone shooting at you. Anyway, one more lapse of reality out of the way. My point is that the Falmer do exactly the same thing that everything else in the game does. They go back and forth as though they're looking for something. Looking. Not listening.
Watch when a Falmer notices you. His head is turned directly toward you, just as a sighted person would. If he was detecting you by hearing that would not be the case. There's a reason that animals (or even a lot of people) cock their heads to one side when trying to locate a sound. At a 45 degree angle to the source of the sound you will get the most accurate bearing to that source. That's simple physics, dealing with the phase difference between sound waves reaching two audio sensors, and that's how we discern the direction of a sound with our ears, as well. Not so, Falmer. They just "look" right at us.
My point? It doesn't matter that the Falmer are blind. It's not an in-game disadvantage to them. It SHOULD be, but it isn't. They might as well have 20:20 vision.
Now to refute something that David said, though. I'm fair about these things. Why shouldn't the Falmer decorate things? If they were painting murals, that would be one thing, but what they're doing is sculpting tactile decorations. Most blind people are into touch in a big way. Many can discern textures that we sighted folk would swear are all the same. They can get a very accurate "image" of an object in their minds by feeling the object. Many can even, through an almost passing touching of a person's face, recognize individuals from each other.