<P> There are two ways an autostereogram can be viewed : wall - eyed and cross-eyed . Most autostereograms ( including those in this article ) are designed to be viewed in only one way , which is usually wall - eyed . Wall - eyed viewing requires that the two eyes adopt a relatively parallel angle , while cross-eyed viewing requires a relatively convergent angle . An image designed for wall - eyed viewing if viewed correctly will appear to pop out of the background , while if viewed cross-eyed it will instead appear as a cut - out behind the background and may be difficult to bring entirely into focus . </P>
<P> There are two ways an autostereogram can be viewed : wall - eyed and cross-eyed . Most autostereograms ( including those in this article ) are designed to be viewed in only one way , which is usually wall - eyed . Wall - eyed viewing requires that the two eyes adopt a relatively parallel angle , while cross-eyed viewing requires a relatively convergent angle . An image designed for wall - eyed viewing if viewed correctly will appear to pop out of the background , while if viewed cross-eyed it will instead appear as a cut - out behind the background and may be difficult to bring entirely into focus . </P>
pictures that you have to look at cross eyed
pictures that you have to look at cross eyed
autostereogram
autostereogram