Yes, this is indeed one of those “magic eye” images popularized in the 1990’s. (I still think these things are neat, even if I am pretty hit-or-miss at being able to see them.) “Autostereogram” is a new word for me, but it makes sense if you break the word down.
Incidentally, the “Mallrats” (1995) scene to which I’ve linked above is a blooper. The image contained by the poster at the mall is not a sailboat; it’s a pattern of different geometric shapes. None of the characters could have seen a sailboat. (Seriously, pause the image on a laptop and look.)
If the below image is inscrutable to you, you can check out (or share) the larger image over at Wikimedia Commons.
Eric Robert Nolan, Author 
