Review on OKH Stainless Reading Blocking Protection Vision Care by Peggy Petty

I'm at my computer right now and I'm having trouble sleeping. I've heard that blue light from computer screens, tablets, and cell phones can ruin your sleep. TAAAAAA, like a good lemming, thought I'd give it a try. I know these are the magnifying glasses I need, so I decided to add a blue lock element to them. Do they block blue light? As if I knew. How do you test them to see if they work or not? I've searched this question and haven't found a good answer, so I guess I'll take her word for it.