OHH I fuckin love em. I love to snort a line of ket when im blowing up on my MDMA, then have my favorite song loaded to a visualizer, put on the 3d glasses, start the song and crack some whipits- the best high ive ever had.
So IMO there the bomb with a visualizer. I took like 10 sheets of 5 glasses from some superbowl promotion and still have like 3 sheets left.
I've also heard them called prismatic glasses...? They don't really do much for me when I'm rolling either (it's hard enough to focus on one thing rather than eight, haha), but they're kind of fun to play with sober.
One time I found those blue/red ones while I was tripping once. Found em right on the sidewalk, they were awesome. Not sure how they would be while I was rolling, but probably pretty cool.