Character vision

So I've had some time and, being anxious to make the player vision, I finally was able to investigate a little how this is done and start making some experiences...

The main idea is to make the player only being aware where his eyes are point to, so if  you look a way you wont be able to know whats coming from your back. I'm also thinking in adding hearing which will allow the player to hear noises in the proximity of his/her character. I think that might bring some panic to the players since they can't know for sure where the noise is coming.