Sometimes the most important things to see are like a magic eye picture.

It's right in front of you, but impossible to see without defocusing your eyes just right.

Once you've practiced and it's intuitive to you, it will feel like the most natural thing in the world. "Look, the shark is right there!"

But other people without the practice will say "All I see is a bunch of dots. Are you sure you aren't making it up?"

Magic eye pictures require practice, the time to take a step back and defocus.

This feels like exactly the wrong thing to do; the busier people are, the less likely they are to see the picture if they can't already see it.

This is one of the reasons it's so hard to get people to see things that are in their blind spot.