I use this method to compare two images or pieces of text, but instead of relaxing the view, I do it cross-eyed, because this removes the requirement that items from both documents can only be separated at max by the separation width of the eyes.
So for example today I was cleaning up a server, freeing up some space, and then made it send me a storage space summary. I compared that one with the one I always get sent at midnight, put them side by side, and compared them via the cross-eye method. Small differences are always noticeable.
I also consider it as my cheat in order to solve those puzzles where you have to find the differences between two images, it doesn't get any easier than this.
So for example today I was cleaning up a server, freeing up some space, and then made it send me a storage space summary. I compared that one with the one I always get sent at midnight, put them side by side, and compared them via the cross-eye method. Small differences are always noticeable.
I also consider it as my cheat in order to solve those puzzles where you have to find the differences between two images, it doesn't get any easier than this.