I have often wondered what it is they actually see.

I suspect that cats can see small winged things that we can't, not to mention small things that actually float through the air.

The thing that gets me is; I notice one of my cats staring intently at something on the wall or ceiling; I try and see what they are looking at; When I turn around they are no longer looking. Everytime this happens, if I refrain from looking they will stare for ages - until I try and see what they are looking at. I am sure they, and all cats, have this lets fool the human game.

Is it just me or do cats fool other people in this way?