For those of us who need help seeing up close. I found a pretty good supplier for bi-focal safety glasses. Just look through all the brands. about half have bi-focals. Bought from them 4-5 times and work pretty good. I use plain old cheaters under helmet but for grinding and cutting these work great.

I like this brand best
http://www.safetyglassesusa.com/alls...is-reader.html