Quote:
Originally Posted by crossi
cell phones only became widely available in the mid 1980's. Not sure how much later before widely used. Wait for the current crop of people who started using them in their teens or before to reach their 80's and compare macular degeneration and cataract percentages VS previous generations at that age. Too soon by several decades to tell if there will be any difference.
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Quote:
Originally Posted by DiapDealer
But cell-phones aren't shining any different kind of light in users' eyes than PCs. The notion that we have decades yet to "wait and see" doesn't hold water in my opinion. There have already been millions of sets of eyes staring at the same kind of light put out by cellphones (for hours on-end per-day) for decades. We don't need data provided by eyes that have had decades-worth of cell-phone screen-time exposure. There's nothing new there. There's more than enough data to know right now. And in my opinion, the silence on actual scientific evidence supporting "damage" is quite deafening.
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Light is light.
The issue wouldn't be about LED light or polarized LCD light.
But it might be focal length.
Throughout most of history human vision was focused at a distance for most of the waking day. Craftmen might work at short or medium distances and clerics at short distances but the bulk of the population tended to see things afar.
Then books and craftmanship propagated and over thelast two centuries the use of glass, especially among the young, has propagated. Some is due to better diagnostics, better medicine, some is due to changed behavior, and assigning causality is far from certain.
The open question is how much is due to what.