ElementsActive FDA-Certified Clip-On blue light blocking lenses were created because people who bought our best selling ElementsActive Fitovers, kept asking us to make clip ons as well! And so we did! These use the same 99.5% blue blocking extra amber lens material that we use in our fitovers. IF you have any issues regarding fit or disorientation, please send us an email info@hselements.com and we'll make it right! We understand our design won't fit 100% of all glasses, but we sure try our hardest to make you satisfied!