22 March 2020 10: 42 am

Sina Technology issued a topic in Weibo:

? # WeChat officially supports dark mode #?

This topic quickly topped the hot search list of the day!

And got 526w search volume!

The data shows that I am not the only one who is excited!

I'm not the only one who was liberated!

23: 47 pm on March 22, 2020

Official announcement of Tencent WeChat official account:

It's late at night, turn on WeChat dark mode?

Friends who are used to staying up late to brush their mobile phones must have had such an experience.

? 1 ? ? Open the official account of WeChat, who pays attention, is ready to learn, and then is blinded by the sudden "dawn"!

? 2 ? See 2 am, blink, and your eyelids click!

According to the research report of the World Health Organization:

There are 600 million myopia patients in China!

According to the epidemiological trend analysis of myopia,

It is predicted that myopia will affect the whole world in 2050. 50% ? The population of.

It can be said that the symptoms of asthenopia, such as dry eyes/astringent eyes/blurred vision/decreased vision, have affected men, women and children all over the world.

According to relevant data,

Modern people spend an average of 16 hours a day.

About 8~ 10 hours is spent staring at various screens such as mobile phones, computers and televisions.

Mobile phones have become a big "weapon" that harms eye health.

The influence even exceeds the computer! ?

At present, nearly 50% of mobile phone users in China spend more than 5 hours a day, and more than 20% spend 3 to 5 hours a day.

The word "low-headed family" also came from this.

? 1 Why do we expect the arrival of the dark mode?

Maybe it's self-help for the eyes!

In the Android developer's document, Google explained three advantages of dark mode, namely, improving battery life, improving the visibility of sensitive person with low vision and strong light, and allowing users to better use devices in poor light environment. Among them, improving battery life is related to the screen material and screen brightness of the mobile phone.

But what about improving poor eyesight and visibility to strong light in sensitive person?

There is no reliable data to confirm! ?

2 The harm of blue light

We are all familiar with the harm of ultraviolet rays to the eyes. According to scientific verification, high-energy short-wave blue light is no less harmful to human eyes than ultraviolet light. The harm of blue light in sunlight is generally less, and the harm of blue light in strong light may be greater. Comparatively speaking, the harm of blue light in electronic products used by people will be greater.

as everyone knows

When the screen of the mobile phone is lit, it will emit blue light. ?

Too much blue light can cause dry eyes, tears, decreased vision and even macular degeneration.

? 3 What is blue light?

Blue light is high-energy short-wave light with a wavelength between 400 nm and 500 nm. This light is in the visible range of human eyes (380 nm to 780 nm), so it is called blue light.

? 4 the source of blue light

Blue light is everywhere in our life. It can be roughly divided into natural blue light and artificial blue light, which exist in many forms. As shown in the table, in addition to sunlight, blue light also comes from many kinds of electronic devices, and it exists in a very wide range.

? 5? Blue light in life

Why is the sky blue?

Because of the short wavelength of blue light, the energy is the highest in short-wave band, so most blue light will scatter and reflect when it meets particles in the atmosphere, resulting in blue sky. Only part of the blue light will hit the earth.

Why do most people think it is more comfortable to look at a warm and soft screen?

When we are in a low light environment, our pupils will be dilated and the amount of light will rise to the original? 4 to 6 times; At the same time, the human eye will change from being sensitive to green to being sensitive to blue light, which means that our eyes are receiving a lot of high-energy blue light, so reading in the dark will make the metropolis feel dazzling. The appearance of this "dark mode" can further reduce the brightness of the screen, narrow the gap between the screen display content and the ambient light intensity, reduce the brightness, adjust the color temperature, change the color system, make you look at the screen less dazzling at night, and relieve visual fatigue.

Will blue light disappear in "dark mode"?

Not really! As long as the screen glows, blue light still exists.

However, turning down the brightness or changing to late-night mode can reduce the damage of blue light to some extent.

Eye fatigue, whose pot is it?

Watching a mobile phone can cause visual fatigue, and it's not entirely the fault of Blu-ray! Long-term close use of eyes, dry eyes, bad posture, etc. Are the causes of visual fatigue.

Minimize the use time of mobile phones.

It is a better way to relieve visual fatigue! ?

Instead of considering whether dark mode protects eyes, it is better to control the duration and environment of playing mobile phones and let our eyes rest for a while.