I have tried a lot of blue light blocking products over the years and Occushield products far exceed my expectations. I have blue light filters on multiple devices (laptops & phones) and can see and, more importantly, feel a difference. My eyes feel less strained even after long days in front on screens. I love that they are antimicrobial without added chemicals. To me, these are a far more effective strategy for reducing blue light exposure than adjusting color settings through software. I also have a couple pairs of their blue light blocking glasses. I love the amber colored lens for driving as they help reduce some of the intensity of modern LED headlights without distorting colors or my vision. A must have for night time driving. As a certified Building Biologist these are the only blue light filter products that I recommend to clients to protect their eyesight and their health.