I love my Alegria UVT prescription glasses and clip ons. I have tried blue light blocking lenses from my optometrist, but they don’t block the correct amount or the correct range of blue light. I know I am getting it right with the knowledge and appropriate circadian support VivaRays provides. All you have to do is read the information on their website to know that you are working with people who have a clear understanding of circadian living. The service they provided was top notch. Prompt reply’s to my questions. Raine worked with me through every step in the process. I Will not wear anything else moving forward.