Reticare US has been putting out an advert claiming that:

"Digital screens can cause long-term eye damage, according to studies. The irreversible damage the light from screens produces in the eyes is more serious than previously thought and, RETICARE is much more effective than previously believed.https://t.co/FFSRJ8ObkZ pic.twitter.com/iQBw0IFDff — Reticare USA (@reticare_usa) September 12, 2018"

The secret to saving your eyes is to put Reticare's screen over your tablet or smartphone.  The PC version will set you back $140. 

However The American Academy of Ophthalmology (AAO) is warning people otherwise.  While it is true that a  study published this summer that found blue light, plus a chemical naturally found in certain eye cells, could damage cells, the researchers did not use any actual cells from our eyes, because our eyes have defenses against exactly this sort of damage.

The words “smartphone blindness” in the title of a different kind of study last year, but this referred to a temporary effect that can happen if you look at a screen with one eye while keeping the other closed.

Other research, like the study that inspired the scary headlines about a ‘global epidemic’ of sight loss, involved rats exposed to extreme amounts of light.