Stereoblindness

So, you know how you have two eyes? Have you ever thought about why you need two eyes instead of just one? Well, it's so that you can see things in 3D!

Your eyes each take a little bit different picture of what you're looking at, and your brain puts those two pictures together to make it look like one picture but in 3D. It's like putting two puzzle pieces together to make a bigger picture.

But sometimes, some people's brains have trouble putting those two pictures together. It's like they can only see one puzzle piece at a time instead of all of them together. This is called stereoblindness.

So, when someone is stereoblind, they can't see things in 3D. Everything looks like a flat picture instead of popping out like it does to your eyes. It's like looking at a 2D movie instead of a 3D movie.

Even though they can't see things in 3D, they can still see and recognize objects and people normally. They just don't get that cool 3D effect.