I'm always suspicious of advice from organizations that would benefit from misinformation (e.g. "Cigarettes are good for you" - the Cigarette Industry or "Looking at screens isn't going to cause you to need more eye doctor services" - some eye doctors).
This is good advice in general, but seems a bit misapplied here- most eye doctors are likely to make more from selling you unnecessary services now then by subtly lying to you in order to damage your eyes :).
