I think these magic eye pictures may be some kind of conspiracy, 'The Emperor's New Clothes'-style, where a few people only pretend to 'see it'. Though if you're following WelshPixie you already know what it's going to say...
Cross your eyes they say... What if your eyes are already crossed? Instructions on such pictures say to 'start with your nose touching the image where the picture should be blurry', so I guess my nose is too long or my nearsightedness too strong...
Content warning for those without stereo vision: we can't see this so don't waste your time.