Absolutely our cats can see things we cannot.
Do your cats ever play "Make Mom look at the ceiling"? Mine do. I'll walk out the hallway into the living room and, as one, all six cats will look up and stare at the ceiling. Now I know very well that there's nothing at all on the ceiling and I tell them so. "There's nothing there! I'm not looking!"
They'll all look at me and then, they'll all stare back at the ceiling. "Stop it! Stop it right now! There's nothing there! And I'm not looking!"
Back at me, back at the ceiling.
"Fine!" I'll look up at the ceiling. And then they'll go to sleep or start washing.
It's a game! And I always lose!
They also like to play "Make Mom look out the hallway". Usually when DH is out of town and I'm alone at night. We'll all be in bed and I'm watching tv. As one, they all look at the bedroom doorway. "Aw, c'mon! Stop it! There's nothing there!"
They'll look at me. Then they'll all look at the bedroom doorway. "Guys, stop! There's nothing there! I'm not playing!"
Look at me. Look at the bedroom doorway. And, of course, you know what happens. I get out of bed and peer out through the bedroom doorway into the hallway.
And as one, they all go to sleep. (And I swear they're laughing.)
And now, they've even taught Mollipop how to play those games!