Smartphones, laptops and LED lamps have one thing in common: they emit blue light. But this can cause lasting damage to the eyes. What is the reason for this and how can you protect yourself?
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Blue light consists of short-wave, high-energy light waves, an intensity similar to the midday sun. As we spend more and more time on our mobile phones and in front of the PC, we expose ourselves to more and more blue light.
The fatal thing about it is that studies have shown that blue light can damage the eyes. It can lead to a so-called macular degeneration. This is an age-related disease that can lead to severe loss of vision and blindness.
But what exactly happens to our eyes? When blue light falls on the retina, too many proteins are produced. This triggers a chain reaction in which the light-sensitive visual cells, the so-called photoreceptors, are killed. This is irreversible, because the visual cells can no longer regenerate afterwards.
In addition, pigment cells in the retina are damaged.
But it’s not just our eyes that are damaged, the light affects our inner clock. It interferes with melatonin production, the hormone that makes us sleepy. This can lead to insomnia and long-term follow-up diseases.
How can we protect ourselves?
Less time in front of the screen is, of course, the most effective protection. Televisions, computer monitors and mobile phone displays usually have a night or eye-saver mode that relieves the eyes. For example, if you work a lot on the screen, you can take a two-minute break after 30 minutes and look into the distance.
Bright LEDs should be installed in such a way that they do not radiate directly into the eye. Opticians offer special glasses that protect against blue light.