Maybe we should go back into the early days of UV lens treatments....................
Quote:
Originally Posted by
Robert Martellaro
Maybe we should go back into the early days of UV lens treatments which started to become popular in the early 1980’s.
That was also the time when the first bluebocker glasses appeared on the market which blocked all UV and blue light passing through the lenses. They also cut all the visible blue light that was still mixed with UV, right up to past the 450nm mark.
The ANSI people decided that UV protection should end at 380nm, and everybody used UV dyes that absobed to 380nm and which were crystal clear, and refused to use the products that had a yellowish tinge.
Dental fillings that were UV, (around the 400nm rank) light curable, and came up around those years, and they needed protection when holding the fibreoptics to the repaired tooth to cure the fillings.
Even then it became known that there was a damaging factor in the visible blue light.
In the mid 1980s we produced a few thousand pairs of glasses for protection when curing the fillings.
coatings that filter blue light just block a small amount of it indoors .............
Quote:
Originally Posted by
Happylady
And most lenses and and coatings that filter blue light just block a small amount of it indoors. Personally I offer it but don't push it at all.
Blue blocker lenses have been around since the early 1980s. As sunglasses they provide much higher contrast and colors as they block the visible blue light that provides a slightly fuzzy image to the eyes.