See Waimea Canyon in realistic 3D stereo without special glasses. Just cross your eyes until there are three images instead of two. Now gaze at the one in the center… don't worry if it's out of focus. Keep gazing at that center image and it will gradually, or perhaps suddenly, snap into focus. You can use your hands to block out the other two ghost images.
`RoundMagazine.net is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com