Scientists from the United States have proven the blue spectrum of radiation display devices, whether it's a smartphone or a tablet, can lead to a complete lack of vision. To protect users, more and more manufacturers are building in their gadgets filters of blue light.

Blue light is characterized by a relatively short wavelength and high frequency oscillations. In contrast to green and red, blue waves only partially reach the fundus, where the receptors are located.

The rest is scattered halfway, which makes the picture less clear and, therefore, makes the eyes more tense. Getting into the receptors, blue light causes a chemical reaction that reduces vision.

Over time, it can seriously damage the retina and cause a deterioration of vision until blindness. To reduce the harm caused by blue radiation, doctors recommend at least two hours before bedtime to refrain from using any device with a screen: smartphones, tablets and televisions.

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