I have had insomnia issues for as long as I can remember. This year, I came across some research that seemed to indicate that blue light caused insomnia in some people. I started experimenting with all sorts of strategies of restricting blue light exposure, and now consider myself cured. The best way I found to block any light that would interfere with sleep was my NoIR laser goggles.<\/p>\n
As a bit of scientific background, the pineal gland in the brain reacts to blue or green light received by the eyes, and stops generating melatonin when blue\/green light is sensed. In our natural habitat, this would only happen during the day – in the unnatural world we live in, we are exposed to a lot of light with a blue\/green component at night. This causes insomnia and poor sleep due to the lack of melatonin.<\/p>\n
The frequency of light that affects the pineal gland is blue, green, and (partly) yellow. So, it’s not enough to just block the blue frequency – it’s important to block all light frequencies up to about 550 or so (red). Also, even a little blue\/green light will still affect the pineal gland, so the optical density of the glasses has to be high (above 5) – they have to really block all light at those frequencies.<\/p>\n
I wear my LaserShields for 2 hours before going to sleep. Because their optical density is so high, they really do not let any blue\/green light through. I can use my laptop or my smartphone with no ill effects; I fall asleep immediately afterwards and sleep like a baby. <\/p>\n