This product reduces eye strain (and the tension headaches and migraines that can result from overexposure to blue light for those who are sensitive to it) -- I love it!
After recently being diagnosed with Macular. Degeneration I had to start shopping for blue blocking products for phone, computer, etc... This is a great product. Priced fair, Easy to apply, blocks those blue meanies and does not impair visual affects on phone. I highly recommend this product.