I'm a borosilicate glass blower and have been fighting with wearing my reader glasses with two different shades of safety glasses over the top of them while torching. When working close-up detail, I would wear my light shades which weren't protecting my eyes at all from the infrared glare, but I needed to be able to see what I was doing. Then I would take those off to put on the dark shade 5's over the top of the readers for long melt ins. The constant switching back and forth was dangerous while working on the torch and I knew I wasn't protecting my eyes full time from the infrared. So, not knowing for sure what I needed, I contacted Mike at Aura Visual Concepts and received excellent advice and friendly customer service!! I'm pleased to say I have received my new safety glasses which are readers with a 50/50 split lens, shade 2 on top/4 on bottom -- and they are exactly what I needed. Thanks again Mike for a great customer service experience and product!!