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Old 11-28-2013, 11:45 AM
crystallographic crystallographic is offline
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Location: Western Sierra Nevadas, Badger Hill, CA
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Quote:
Originally Posted by Richard K View Post
Kent,
Your historical and scientific findings on eye protection are much appreciated.
Nowadays Movies and Glasses are both expensive.

I started a new thread on Digital Eyewear Lenses..Another vision miricale
http://allmetalshaping.com/showthread.php?t=10168s
Thanks, Richard. I've been teaching and writing this for a longer time than I ever imagined I would.

Yes, the digital eyewear is a very good topic to bring up since it affects or will affect everyone, sooner or later. My vision has always been remarked on by others, reading road signs at long distances and walking safely in the dark - but it does not last forever, sigh.

I should mention also, the eyes' need for liight doubles after the age of 40 and doubles again at 50, and doubles again ... etc. So, with a weld-darkening filter in front of your eyes - after the age of 40 - the need for magnification goes up. Over-magnification might be a necessary consideration when welding. I use 1.5D cheaters in my headgear and I wear 1.5D readers down my nose underneath the goggle, so that if I need more clarity I can tilt my vision down through the added magnification provided by the readers. Sort of like using close-up lenses on the camera - stacking the +1, +2, and +3 lenses in different combinations for the view required - you can vary your own welding magnification when needed, as your available light varies.
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Kent

http://www.tinmantech.com

"All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919.
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