Love Ocushield! I did A LOT of research on this product after our eye doctor recommended I get blue light blockers for my kids, since they're remote this entire school year. He suggested blue light blocking glasses but I wanted something that would be on their screens 24/7 instead. There's no change in how the colors appear on the screen, my kids have less eye strain and headaches and Sarah Trevor provided incredible customer service! She responded quickly (Keep in mind, there is a 6hr time difference from the US) and she kept me updated on the shipping, since the phone products I also ordered were backordered. She also helped me in finding the correct size to order for my desktop. I've shared this company with my coworkers because I really believe in it. The product does ship from the UK, so it takes a bit longer - especially due to the Covid19 situation - but I didn't mind. Thank you Ocushield & Sarah! :)