Visible light constitutes the combination of different lights of different wavelengths. This wavelength is directly proportional to the energy and thus defines the penetration capacity of each individual light component. The wavelength of blue light lies between the range of 380nm and 500nm, it is considered one of the shortest, highest-energy wavelengths. The penetration power of blue light is far greater as compared to other colours in the spectrum. This increased ability of penetration is precisely what makes blue light dangerous. And LED technology - used by screens - is a high emitter of blue light.
A Harvard study has highlighted the harmful effect of blue light which includes damage to light-sensitive cells in the retina. The damage that blue light causes resembles macular degeneration, believed to ultimately cause permanent vision loss.2 Additionally, chronic exposure to blue light before sleeping has been shown to inhibit the production of melatonin, a hormone regulating sleep and hence can lead to disruption of your circadian rhythm.3
Digital eye-strain syndrome is a combination of symptoms that is believed to occur due to prolonged use of electronic gadgets. The syndrome comprises of a combination of symptoms like the blurring of vision, difficulty in focusing on the screen, chronically dry and irritated eyes, constant headaches, neck and back pain. The statistics are scary, nearly 70% of adults who are regular users of media devices have been observed to experience some symptoms of digital eye strain. In fact, digital eye-strain has overtaken carpal tunnel syndrome as the number one computer-related complaint, with as high as 70% of adults reporting some symptoms of digital eye strain syndrome.1
So the next time you feel the need to stare at a screen, think twice!
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