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Why Blue Light Is ‘Toxic’ to Your Eyes

That light glaring at you from computer screen or cellphone not only is a sleep inhibitor, but bad for your eyes, according to a study published in Scientific Reports. The harms are great: Age-related macular degeneration — a leading cause of blindness in the U.S. — is just one photoreceptor-killing problem that can occur due to blue light, Mother Nature Network said. The study compared exposure to blue, red, yellow and green lights, and found that blue light triggered a reaction that stimulated photoreceptor-killing cells.

I personally have been using blue light-blocking glasses at night for quite some time, in an attempt to help with my sleep as well as to limit my exposure to the harmful rays to my eyes. This is because, when it comes to sleep, when you spend all or a majority of your day indoors, you essentially enter a state of "light deficiency." The reason why light intensity is important is because it serves as the major synchronizer of your master body clock, which is composed of a group of cells in your brain called the suprachiasmatic nuclei (SCN).

There is a significant cost to your health from light pollution resulting from living in a 24/7 society. A growing number of street lights and lit signs obscure the night sky, and your bedroom is likely dimly lit from street lamps, digital equipment or alarm clocks. It’s not possible to “feel” the changes in your brain and body from outdoor street light that seeps in around your bedroom curtains or the dim glow from your alarm clock.

Then, when you add in the blue light that you get from all the various lamps and electronic devices you may be exposed to, health conditions aside, you are basically setting yourself up for a sleepless — or at the least, restless — night.

So, if you want to get good sleep, you have to have properly aligned circadian rhythms, and step No. 1 is to make sure you get a sufficient dose of bright light exposure during the daytime. Then, at night, you need to turn off your electronic devices and avoid blue light at night as much as possible.

After sundown, shift to a low-wattage bulb with yellow, orange or red light if you need illumination. A salt lamp illuminated by a five-watt bulb is an ideal solution that will not interfere with your melatonin production. If using a computer or smart phone, install blue light-blocking software like f.lux.

The easiest solution, which I’ve already mentioned that I use myself, is to simply use amber colored glasses that block blue light.
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