
Originally Posted by
radkins
Even after well over 20 years that these things have been around this myth still persists and it is a just a myth, you will not damage your eyes if the lens reacts slowly or even fails to react at all. The electronic function of the lens has nothing to do with the protection from the UV/IR rays as these are absorbed by the lens material and is fully functional whether the lens switches or not, the darkening shade filters light in the visible spectrum and the UV/IR is already gone at this point. Your eyes do not receive any damaging rays whether the lens is dark or not as these helmets provide 100% of available protection in the light or dark phase meaning it is a myth that you will receive a few milliseconds of exposure before the lens goes dark, you will not! Myths and urban legends about this are common and you will hear all kinds of BS stories about people damaging their eyes because a helmet was darkening too slowly but these stories are simply not true, the lens just does not work that way, and if it were true then the product liability and workers comp lawyers would have put them out of business years ago!
This is very true. I am a Physics teacher not a welder so I am not the greatest welder, but I know that the properties of the glass are what will protect your eyes from harmful radiation not the auto-darkening feature.
Think of it like this, It has been proven, over and over again, that there is nothing in the universe that can travel at the speed of light....NOTHING (as long as it begins life at less than the speed of light). So how could any helmet react fast enough to stop all the harmful rays at start up?
The answer is simple...they would not be able to... and that is an indisputable fact. That means that anyone using an Auto helmet is getting flashed every time they use it(at least a little), if the myth was true.
I have a Speedglass, but only because it was a gift. I like it, but even so, I have been flashed a few times.
This would make a great Mythbusters topic.
Get the HF one if that's what your budget allows and have fun.
\"I see\" said the blind man, as he picked up his hammer and saw.