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Hi Rusty, First thing you need to do is go get a pair of glass reading glasses at the eye doc. You can have them made for any focal length for the type of vision that you have. So be sure to tell the eye Doc about how far you want to see (weld) away from your face. Example: Mine are made to cover from 8" out as I can see well at 0 to 8". I also have tri-focals and the Doc incorperates the "no line" tri-focal into the lens. This lets me see all my welds no matter what the focal length that I need. This will elimanate any need for a external cheeter lens. There is a difference in a plastic lens and a all glass lens.
A plastic lens will create a weld puddle distortion of two weld puddles with-in the lens area. One phoney weld puddle and the real weld puddle. This distortion can be seen best seen while Tig welding but is present under all types of welding. A all glass lens will stop the distortion. The best glass lens I found is called a Cool-Ray lens. The glass cool-ray lens has a layer of gold over the glass face. They cost about $60eh but well worth it as your eyes will not be tired nor burned at the end of 8hrs of welding. Being there is a layer of gold on the outside of the lens, you want to use a fiber gasket, then a clear glass lens, then the glass cool-ray lens, then another clear glass lens on the inside. UpDate: I looked at my last gold Cool-Ray lens and they now have a clear glass lens, then a gold layer, then a clear glass lens. but that still will require seperate clear lens before and after the shielding lens as I described above. There is a gold colored plastic lens, this is not the correct lens and cost about $15! Autodarkening welding hoods: I'm not a fan of the auto hoods. No1, they use a plastic lens and you get weld puddle distortion. No2, there heavy and your neck will let you know it at the end of the day. No3 and the big one, what comes first to make the autodarken feature work? The ARC strike! so your eyes will pick-up a small amount of arc flash before the lens darkens. T_Bone
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