Is crossing your eyes really bad for you? We asked an optometrist.

Is crossing your eyes really bad for you? Short answer: You're fine, don't worry. No, your eyes won't get stuck if you cross them for a joke every once in a while. Breakthroughs, discoveries, and DIY tips sent every weekday. When your mom told you to stop crossing your eyes as a kid or they'd stay stuck that way, was she right?