Review on Hydrotac Bifocal 20 3 00 Diopter by Dana Lynn

I need +3 diopter for close range TIG welding (old eyes). I had trouble finding +3 diopter glasses where the bifocal part wasn't just a very small part of the lens. These hydrotacs work well for me as they are much larger. I can put them in any glasses, even glasses. I've only dropped one lens so far, and that was on a very humid day. The inside of the goggle was pretty wet and the right hydrotac came loose. Otherwise they stayed in place very well. Even here in Yuma, Arizona where summer temperatures top 100 degrees. I will definitely buy them again.