Sensor bar for the bridge's Wii. The audience only sees the lights because cameras can pick up infrared. Data finds them amusing, and Geordi just filters them out; the rest of the crew can't see them.
Lol, can't say I have. But I did eventually learn that the sensor bars are just dumb IR lights that the remotes track rather than something more complex, so I can see how it would work.
This reminds me of Duck Hunt. Basically you’re not shooting anything from the “gun”. Instead, for a brief moment, the screen turns black and the ducks turn into white blocks. The gun will then register if you’re pointing it at a white block or not and register it as a hit. This was specifically attuned to the refresh rates of CRTs, and consequently will not work with newer LED/LCD TVs.