Have you ever seen a picture of a beautiful rainbow where all the colors are spreading apart from each other? That's like divergence in our eyes. Our two eyes work together so we can see one picture. But sometimes, our eyes don't point the same way. This makes the images we see too different and our brain can't put them together. This is called double vision. By using special glasses or eye exercises, we can teach our eyes how to work together and stop seeing two pictures.