Well, generally speaking, you should know that crossed eyes are the medical terms for eye conditions commonly called eye turns, strabismus. And when you get it, it will just lead to many problems, such as eyestrain, blurry vision. Also, double vision, and headaches may occur too. And in some degree, strabismus can correct by itself. But on the other hand, you can have surgery to correct it. And also patches and corrective glasses will be effective. And for the causes, crossed eyes are typically caused by injury to the eye orbit. And at the same time, injuries to the brain, such as with a stroke or head injury can lead to strabismus too. So you need to take car of your eyes. And when you get crossed eyes, just go and see the doctor as soon as possible.