I bought the Tribal Rainbow Wormhole Kaleidoscope Glasses and absolutely love them! They are good if you want to still be able to see out of the glasses, as the diffraction effect occurs only in the periphery vision. The only concern is that the glasses are quite heavy, and would probably break if dropped, which might be a problem at parties and events. Another disadvantage perhaps is that the frames are quite small, and so might not fit all heads. I also bought the GloFX Black Wormhole Kaleidoscope Goggles, and like them. I was a bit disappointed to discover that they are less effective than the Wormhole Kaleidoscope Glasses - the reason for this is that the circle of normal vision in each lens is much bigger in the goggles than in the glasses, and so the diffraction effect is really very limited to the periphery vision in the goggles, which is really disappointing considering they are so expensive. However, they are more likely to stay on the head than the glasses, and they are adjustable so fit more head types.