A lot of the recent "awareness" of CVS is based off people who want to sell you blue light blocking glasses.
This infographic is one of my favorite examples: http://vspblog.com/blue-light-infographic/
There's lots of numbers and statistics there, but none of it is actually scientific. The closest you get is that "VSP Optometrists report a 50% increase in digital eye strain and the effects of blue light exposure."
But I can promise you as someone on the receiving end of VSP's marketing to eye care professionals, that they're marketing the bejeezus out of their blue light blocking technology to their eye care professionals.
So, if you're an optometrist and you have a financial incentive to sell blue-light blocking coatings, and you're getting tons of marketing about the epidemic of digital eye strain in your inbox and mailbox and the publications you read, of course you're going to notice an increase of its incidents in your patients.
If you're experiencing discomfort from using your computer for hours every day, you should absolutely do things to alleviate that discomfort. But the thing that all this marketing and FUD leaves out, is that there's no evidence that blue light exposure (from digital devices) or CVS or digital eye strain or whatever they'll be calling it in a week causes any long-term damage to your eyes.
From the American Academy of Ophthalmology[1]: "Staring at your computer screen, smartphone or other digital devices for long periods won’t cause permanent eye damage, but your eyes may feel dry and tired."
[1]: http://www.aao.org/eye-health/tips-prevention/computer-usage