How to put on glass screen protector: If you have cataracts and are about to have cataract surgery, ask your surgeon what type of intraocular lens (IOL) will be used to replace your cloudy natural lens, and how much blue light protection the IOL provides. After cataract surgery you might benefit from eyeglasses that have lenses with a special blue light filter — especially if you spend long hours in front of a computer screen or using other digital devices. So, is all blue light bad for you? Why not block all blue light, all the time? Bad idea. It’s well documented that some blue light exposure is essential for good health. Research has shown that high-energy visible light boosts alertness, helps memory and cognitive function and elevates mood. In fact, something called light therapy is used to treat seasonal affective disorder (SAD) — a type of depression that’s related to changes in seasons, with symptoms usually beginning in the fall and continuing through winter.
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. Discover a few extra info on how to apply tempered glass screen protector without bubbles.
Reduce glare. Glass screens can produce glare that can aggravate the eye. If you don’t have control over the lighting in your environment, try using a matte screen filter. Follow the 20-20-20 Rule. Every 20 minutes, give your eyes a break by looking at an object 20 feet away for 20 seconds. This allows your eyes to relax. Limit devices before bed. Research shows that the blue light from your phone and other screens may affect the body’s natural wake and sleep cycle. During the day, blue light wakes us up and stimulates us. It does the same thing at night, which makes it harder to get to sleep. Limit screen time one to two hours before bedtime. Use nighttime settings on devices and computers that minimize blue light exposure.
Anything above 380 nanometers is not visible to the human eye and cannot be seen. While invisible, these frequencies can still be useful. Some epoxies used in dental work use ultraviolet light to accelerate the chemical process of fixing teeth. Tanning beds use these frequencies to artificially increase tan color (though of course you wouldn’t want to be bathed in it for hours, or you could develop significant health problems).
Generally, scientists say the visible light spectrum comprises electromagnetic radiation with wavelengths ranging from 380 nanometers (nm) on the blue end of the spectrum to about 700 nm on the red end. (By the way, a nanometer is one billionth of a meter — that’s 0.000000001 meter!) Blue light generally is defined as visible light ranging from 380 to 500 nm. Blue light sometimes is further broken down into blue-violet light (roughly 380 to 450 nm) and blue-turquoise light (roughly 450 to 500 nm). See a few more info on Perfectsight iphone screen protectors.