Where to buy blue light glasses? How to remove the old phone or tablet screen protector? Prepare all the relevant tools and materials. The phone, Alcohol pad, Dust absorber, Cleaning cloth, New screen protector, Squeeze card. First of all, we should remove the old screen protector of our phone. Pick up one corner of the screen protector with a sharp object like credit card. I choose a knife. Everyone chooses according to the tools at hand. Pay attention to pull up the screen protector and do not scratch the phone screen.
Visible light is much more complex than you might think. Stepping outdoors into sunlight; flipping on a wall switch indoors; turning on your computer, phone or other digital device — all of these things result in your eyes being exposed to a variety of visible (and sometimes invisible) light rays that can have a range of effects.
In daily artificial lighting, when the illumination is 100–300lx and the flash frequency is not less than 150HZ, the light is more suitable for the human eyes. When the illumination is too strong, and the flash frequency is insufficient, it is easy to cause eye fatigue, which may cause ametropia in the human eye. When watching the mobile phone for a long time, the glare that is constantly flashing on the screen will cause continuous stimulation to the eyes. When the eyes keep capturing these light and shadows, the eyes will feel tired and cause damage to the tear film on the surface of the eyeball, causing dry eyes and deepen the myopia. See additional info at https://www.perfectsight.co/eye-care/anti-glare-eye-care-screen.html.
Your mobile devices: iPhone users can use Night Shift (under Settings > Display) and the less-known Color Tint feature; Android users can download Twilight for their screen-dimming needs. If you can’t help bringing your phone to bed, wear HEV blocking glasses, put a blue filter screen on your phone, or place it face down while it plays; play a movie or ambient white noise, or podcast clips to listen to while falling asleep. Or better yet, drift off while reading an analog book: It will force your brain to imagine, and that effort will wear you out more than the instant simulation brought by the visual nature of our devices.
Allow distance. Being too close to your screen is also a factor in how your eyes can be negatively affected—they have to work harder to see things that are closer. If possible, keep your monitor or screen about 25 inches away, or about an arm’s length away. Make sure to position the screen so your eye gaze is directed slightly downward. Adjust the brightness. When a screen is much brighter than the surrounding light, eyes have to work harder. If you can, adjust your room lighting and try increasing the contrast on your screen.
The eye is not very good at blocking blue light. Anterior structures of the adult human eye (the cornea and lens) are very effective at blocking UV rays from reaching the light-sensitive retina at the back of the eyeball. In fact, less than one percent of UV radiation from the sun reaches the retina, even if you aren’t wearing sunglasses. (Keep in mind, though, that sunglasses that block 100 percent of UV are essential to protect these and other parts of the eye from damage that could lead to cataracts, snow blindness, a pinguecula and/or pterygium, and even cancer.) On the other hand, virtually all visible blue light passes through the cornea and lens and reaches the retina. See a few more info on perfectsight.co.