In fact, for your eyesight, please make the following settings for the computer: Desktop-> Right click-> Attribute-> Appearance-> Advanced-> item selection (window), color 1(L) selection (other) change hue to: 85. Saturation: 123. Brightness: 205- > Add to custom color-> Confirm at the selected point of custom color-> OK. This hue is configured by the ophthalmologist. Long-term use will effectively relieve eye fatigue and protect eyes.

Truth: We have been taught since childhood that after writing and reading for a period of time, we should look at the green plants in the distance to protect our eyesight. This practice does have some effect. Later, according to this "common sense", some businesses introduced exercise books made of green writing paper, claiming to prevent myopia. The myth of "bean paste green protects eyesight" can be regarded as a modern version of green exercise book.

So are these practices useful?

Before discussing these issues, let's give a definition of "green". Green is a common color in nature and one of the three primary colors. The wavelength of green light is between 520 and 570 nanometers. In the RGB color model, the RGB value of pure green is (0,255,0), and the color with the second largest value among any RGB values belongs to the green system. As the red bean sand green set in the myth at the beginning of this article, the RGB value is (199,237,204), which is similar to celadon green.

Let's check online articles about green writing paper, almost all of which are only vague explanations: green paper can effectively relieve visual fatigue. In fact, green light is located in the center of the visible spectrum, in the most sensitive color frequency range of human eyes [1]. In addition, color psychology believes that green can make people feel comfortable and calm [2]. But these are not enough to show that green can protect vision, and there is no relevant research to support this.

From the perspective of comparative recognition [3], the green book has no particularly positive effect on vision. Literature shows that under the condition of low color saturation, there is no essential difference between green paper and white paper in near vision (referring to the resolution of human eyes at close range) [4]. However, if the color saturation of paper is too high, the contrast between text and background will be reduced, which will affect the contrast of text, reduce the recognition of text and make eyes more tired. It is found that there is no reliable literature or experiment to support that books made of green paper can protect eyesight for a long time.

Looking at distant green plants to relax nervous eyes is an effective means to prevent myopia, but it is not so much that green plants relax eyes as that the distance between plants and human eyes is much greater than that between books and human eyes. Focusing in the distance makes the ciliary muscles in a relaxed state and get a rest when they are nervous. I believe that green homework can protect my eyesight very well, so it is more reliable to look out of the window.

As mentioned earlier, the ability of green to protect vision is not reliable. The only way to set the computer to bean paste green is to make the screen brightness less dazzling. "Bean paste green" has no effect on dry eye caused by too few blinks and too fast evaporation of tears, visual fatigue and upper body pain caused by sitting posture and distance from the screen.

Using the computer for a long time may indeed lead to vision problems. The American Optometry Association (AOA) defines it as computer vision syndrome (CVS) [6], also known as VDT syndrome. Its main symptoms are asthenopia, blurred vision, dry eyes, head, neck and shoulder pain. The main reasons for these problems are: the screen is too bright or too dark, the distance between the eyes and the screen is not appropriate, the sitting posture is not appropriate, the number of blinks is reduced when using the computer, and all the vision problems of the computer users themselves.

How to protect your eyes by using computer for a long time? Here are some suggestions:

1 Set the screen brightness so that it is not dazzling or too dark.

Adjust the sitting posture to ensure that the upper body is straight and the neck is well supported.

3 Adjust the computer screen, tables and chairs, as shown in the figure below.

After using the computer for a period of time, get up and look at the distance and relax your eyes.

When using the computer for a long time, you should pay attention to rest and blink, humidify the working environment appropriately, and relieve dry eye.