I didnt get much love for this concept before, but i just tried it and it was very helpful in releasing tension in my eyes.
https://duckduckgo.com/?q=magic+eye&t=ffab&iax=images&ia=images
Magic Eye as therapy
Fun stuff.. tricky for me.. what you're supposed to see is a 3-d object floating on a flat background.. but at first what I saw was the background in the foreground and a 3d-hollow cut out of depth inwards, which didn't make much sense to me.. I am able to get the full effect if I take my glasses off.. but I am also able to see multiple layers of depth as well if I look at it differently.
Some images are easier to see than others.
reaganry [Spoiler- it's a dragon]
Reminds me of a fire pokemon
If you want to make some yourself
http://peeinears.github.io/MagicEye.js/