What is blue light filter: What is blue light? Sunlight contains red, orange, yellow, green and blue light rays and many shades of each of these colors, depending on the energy and wavelength of the individual rays (also called electromagnetic radiation). Combined, this spectrum of colored light rays creates what we call “white light” or sunlight.
Artificial blue light, the kind associated with LED and screen-based OLED illumination, operates on a different level of the spectrum, in the 380–500 nanometer range. The 415–455 nanometer range is the most harmful — what’s called high-energy visible light, or HEV — and it’s where digital blue light from laptops, tablets and mobile phones operate. Sunglasses are designed to block light in this range — as are welding helmets! But the tech industry has been slow to adjust. “Apple for sure doesn’t build to that standard,” Bill pointed out.
Blue light is everywhere in digital screen’ world. But you might be wondering what does all this screen time mean for our eyes? A convenient way to reduce your blue light exposure is to use a blue light filters for your iPhone, iPad, MacBook and protective eyewear. Blue light filters are some special tools applied special craft or materials that could blocks light in the 380-500 nanometer range. Usually we call these tools as blue light filter: blue light screen protectors, blue light blocking glasses or lenses, anti blue light app, blue light filting lights and so on. Discover a few more info on iPhone blue light filter.
You may be wondering why using a computer is so much harder on your eyes than reading printed materials like a book or magazine. The main reason is that when we stare at computer screens, we tend to blink less. In fact, while focusing on digital displays, a person’s blink rate can be reduced by a third to a half, which causes their eyes to dry out. Additionally, many of us are not viewing these screens from the optimal distance. In recent years, a popular solution to this problem has been blue light filters; namely, expensive computer glasses. However, these glasses, as well as other blue light filters, are no more effective at reducing the symptoms of eye strain than a neutral filter. Instead of spending money on something that may not help, try these simple and effective tips first.
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.
Tempered glass screen prtector (aslo called Toughened glass screen protector) is a type of safety glass screen cover processed by controlled thermal or chemical treatments to increase its strength compared with normal glass screen protector. Tempering craft puts the outer surfaces into compression and the inner surfaces into tension.Tempered glass screen prtector is 5 to 10 times more stronger than normal glass screen protector. Tempered glass screen protector is usually made of multi-layered structure, 3-5 layer is most frequently on market.(PERFECTSIGHT best eye care tempered glass screen protectors for iPhone, iPad, MacBook even is up to 11 layer). Find more info at https://www.perfectsight.co/.