Ocushields blue light filters for MacBook Air and Pro block blue light before it gets to your eyes. This helps to keep them in tip-top condition, reducing dryness and facilitating focus. Created by qualified optometrists, our FDA registered anti-blue light filters block up to 99% of damaging UV and blue light emissions between 300-400nm, and as much as 54% of harmful blue light between 400-470nm. Whats more, by limiting your exposure to blue light before bed, Ocushields blue light filter for MacBooks will help you catch ZZZs and enjoy all the benefits of a good nights kip.