I see a few people are talking about psychopaths being able to see the "thing" or whatever and not be affected. Just wonderinng if that is because of the story told by the guy who gets into the house - the guy with the drawings. He told the story of the inmates of the insane asylum. If so, why do you believe that story? Clearly he was lying about stuff, why believe that.

If it is just some general idea about the people who can view it and not be affected, why? And what makes their eyes weird?

I agree with someone who wrote earlier that there needs to be clues as to what is going on unless the actual thing really isn;t central to the point.

I enjoyed the movie, but I thought the ending was very weak. The way it was revealed that they were at a School for the Blind just seemed so cheap - as if that was some sort of big revelation.