The principle is soundA wise sniper san once said to me look right to left rather than our normal reading direction of left to right..does it work...no idea
Stay on routine and our brains don’t concentrate, just scanning.
(This is why you can sometimes get away without camouflage - crouched and still and people just looking around won’t see the obvious right in front, but might catch you in their peripheral vision)
Reversing to view right to left changes the brains routine, it has to concentrate to interpret the view and then sees what is there