Is it necessary to block blue light?

In this digital age, our lives are surrounded by various screens. From waking up in the morning to check mobile phone messages, to working in front of the computer for a long time, to watching TV series and playing games at night, screens have become an indispensable part of our lives. However, we often hear that electronic screens emit blue light. Some people say that blue light can affect vision, while others say that blue light can damage the eyes. Today, let's learn about blue light.

Do you know what blue light is?

The light that our eyes can distinguish is called visible light, with a wavelength of about 380nm~780nm, which is only a part of all light. Blue light is the part of visible light with a shorter wavelength and stronger energy. ISO 8980-3 defines blue light as 380nm~500nm. In our lives, the source of the most blue light is actually the sun, followed by computer monitors, mobile phones, tablets and other electronic device screens and LED lights.

So does all blue light affect our eyes?

In fact, blue light can be good or bad. Only high-energy short-wave blue light with a wavelength of 380nm~450nm is the culprit that affects our visual effects!

What effects does high-energy short-wave blue light have on visual effects?

High-energy, short-wave blue light is more likely to scatter in the eye, and the image you see at this time is likely to have glare or starbursts. For example, it is very obvious when driving at night. When the opposite vehicle turns on the high beam, you will feel that your vision is greatly reduced due to the glare and starbursts, which affects our driving safety. At the same time, we cannot ignore that the electronic screen itself will also emit a large amount of blue light, which will also scatter in the eye, causing glare and starbursts. When using electronic screens for a long time, it is easy to cause visual fatigue and even dry eyes. Therefore, these short-wave blue lights are a stumbling block to comfortable eye use in our lives and work.

What should we do in the face of harmful blue light?

In fact, there are many ways. First of all, controlling the time of using electronic devices is the key. Every 20 minutes, let your eyes rest, look into the distance or close your eyes to rest. Secondly, we can choose to wear contact lenses or lenses with anti-blue light function. Of course, we must pay attention to whether they can effectively filter harmful blue light. We can pay attention to whether the lenses can filter specific blue light bands, because blue-green light with longer wavelengths does not need to be filtered, and pay attention to distinguishing blue light from 380nm to 450nm. In addition, many electronic devices now have "night mode" or "eye protection mode", and turning on these functions can also reduce the output of blue light to a certain extent.

I believe that the above introduction will help you understand blue light more clearly, and you will also learn how to distinguish and protect your eyes from harmful blue light. I hope everyone's eyes will always be bright and enjoy clear and comfortable vision!