✓? 100 Day Money Back Guarantee - Ocushield is research led & designed and developed by optometrists - we’re confident you will love our product. ✓? Easy, bubble free installation - comes with a simple installation tray to get the perfect fit. ✓? Premium Tempered Glass - Made from reinforced 9H tempered glass, our scratch proof, smudge free finish provides ultimate scratch and impact protection. ✓? Minimise the negative effects of blue light, such as eye strain, poor sleep, blurry vision, headaches and dry eyes. ✓? Block Harmful Blue Light - blocks 99% of harmful UV and blue light emissions between 300-400 nm, and up to 54% of harmful blue light between 400-470 nm, all whilst maintaining true color.