When you cross your eyes and stare at the screen, a 3D image will pop out! This is a fun brain-training game that uses mysterious stereograms.
TimesMachine is an exclusive benefit for home delivery and digital subscribers. About the Archive This is a digitized version of an article from The Times’s print archive, before the start of online ...
Stereograms mark a threshold in understanding visual perception. Modern study of stereopsis began with Wheatstone's invention of the stereogram and stereoscope (~ 1832), important tools in vision ...
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