Dry eyes happen without LCDs, and CVS isn't actually bad for your health or the health of your eyes. Not to mention that most people don't get it, even if they're staring at a screen for most hours of the day. As someone who stares at a VR LCD screen for almost all of my workday with eyes that've gotten less dry as I've started using screens more, I'm pretty much convinced CVS is a myth.

(And, of course, there's the fact that no one has ever been able to reproduce a study on CVS... also not giving it a very strong case.)