Okay kiddo, let me first ask you if you know what vision is. Remember how you see things around you, like your favorite toys or your mommy's face? That's your vision at work!
Now, there are scientists who want to understand how our eyes and brain work together to make us see things. They have a theory called the vision hypothesis, which is like a guess they make about how this happens.
According to this hypothesis, when you look at an object, the light from that object goes into your eyes and hits your retina, which is like a camera in your eye that takes a picture of what you see. Then, that picture gets sent to your brain to be processed or decoded, which means your brain figures out what you're looking at.
But how does your brain do that? Well, the vision hypothesis says that your brain has different parts called "modules" that work together to figure out what you see. Each module is like a mini computer that looks at different features of the picture, such as shapes, colors, and patterns.
Then, these modules send signals to other parts of your brain that combine all this information together and make sense of it. That's why when you look at your mommy's face, your brain can recognize it, even if she's wearing a hat or different clothes.
So, the vision hypothesis is just a fancy name for scientists' best guess about how our eyes and brain work together to give us our amazing sense of sight. Pretty cool, right?