Meme-science. What about those laptops people staring at for 8 hours/day and those 50" back-lit TVs running 16h/day? Do they contribute to a "health-damage"? To

Meme-science. What about those laptops people staring at for 8 hours/day and those 50" back-lit TVs running 16h/day? Do they contribute to a "health-damage"? To what extend? How do they factor out "stress" from being a subject in a "study" from "stress" of being exposed to deadly back-lit? "Methodology" aside. Let me guess - the "study" has been sponsored by affiliates of e-ink display producers/sellers?