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That smartphones or other mobile devices can be responsible for various health problems is, so to speak, a well-worn fact. The latest research organized by the American University of Toledo confirms that the blue-colored light from the screens of smartphones, laptops or similar digital devices seriously damages the eyesight and can lead to blindness.

Tests confirm that excessive exposure to blue light causes the formation of toxic molecular substances on the retina of the eye. These cause damage and, in worse cases, complete degeneration of the macula. This fact is due to the fact that blue light has a shorter wavelength and more intense energy than other colors. Dr. Ajith Karunarathne, a leading specialist working in the Department of Chemistry and Biology, describes this phenomenon as follows: “We are exposed to blue light almost constantly, but neither the lens nor the cornea can adequately regulate or reflect it. The fact that blue light damages the retina and impairs overall visual function is nothing new. Our experiments reveal new possibilities, thanks to which we will be able to better defend ourselves against this damage. This is not about eliminating the problem completely, but slowing it down.”

Thanks to experiments, we could combat this problem with various alternatives, the most likely of which are special eye drops.

Macular degeneration affects up to 2,4% of the adult population. Rapid signs of damage only occur in an advanced phase of life, but cases show deterioration of eyesight even in young users of mobile devices. Blue light starts a chain of chemical reactions on the retina, and these are responsible for the subsequent dissolution of the membrane and photoreceptors. However, photoreceptor cells do not regenerate, so once they are damaged or completely degenerate, it is an irreversible condition.

Among other things, it was discovered during the experiments that the introduction of retinal molecules into other cells located in the body also causes them to die after contact with blue light. These are cancer or heart cells and neurons. On the other hand, blue light alone or retinal molecules without blue light have no effect on the cells at all. Blue light has the greatest effect on the retina of the eye in a dark environment or in total darkness. Experts therefore recommend avoiding using smartphones and laptops in the dark, or wearing sunglasses that reflect this harmful radiation during the day.

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