So, I never had to try, it just always worked for me. But, a friend of mine once said that she got it to work by holding her finger up in front of her face, like a foot away, and then looking past the finger at something farther away. Then, back to the finger. Looking past her finger, she’d see two of the finger, but as soon as she was thinking about the finger, she’d focus again on it and start just seeing the one finger. The trick to the magic eye is basically getting to where you can deliberately focus past the finger and still look at it? I don’t know, I just look and see the image. Once, someone made a fake one that had no image to try to mess with me. There’s also a neat trick where you can immediately see the difference in side by side images by “magic eye-ing” them. The differences kinda flicker or glow, it’s hard to explain.