I have the ISO tunes and love them. Now I feel funny in my shop if I don't have the ISO tunes in and the safety glasses on. Thankfully I found The catseye safety glasses at FastCap with the built in readers. Lets my old eyes see rules and fine details better.I was thinking of asking for the ISO tunes - does anyone have them / use them? (A little higher than the $50, but if they are no good, they are no good at $50 or $100!)