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Editor’s note: This article is from the micro-channel public number “Popov students” (ID: trip517), Author: Popov, 36 krypton release authorized.”Dark mode provides an excellent visual experience, especially in low-light environments … helping you focus on your work, as your content will be more prominent, and the darkened controls and windows will be hidden from the background”In September 2019, when Apple launched the Dark Model, it was promoted on the official website.Last time, when people talked about the relationship between Apple and color in a wide range, they focused on the iPhone case and Tim Cook’s shirt.Attentive editor of the American Management Science Quarterly Henry Griffin previously noticed that after Tim Cook became Apple’s CEO, he wore dark shirts in public, and previously he had photos on the official website.Wearing a light blue shirt.The black turtleneck sweater designed by Issey Miyake was once an integral part of the distinctive style of the late Apple founder Steve Jobs.As his successor, Cook faces a daunting challenge: Even if he loses charismatic leaders, he must convince employees that Apple’s culture still exists.Cook and Jobs are so different.Therefore, the change in the color of Cook’s shirt is that he has found a simple and effective formalist management method that allows him to reflect the continuity of Apple’s leadership without fully imitating Steve Jobs.From iPhone to Mac, when Cook decided to launch dark mode on almost all Apple products, and even required that all apps listed on the AppStore must be compatible with dark mode, head companies such as Google and Huawei in the Android camp have alsoThe darkest mode has been introduced in the latest mobile phones, and correspondingly mainstream applications from WhatsApp to WeChat have also launched the dark mode.This is an alternative copy of history.In the 1960s, the computing display device was a cathode ray tube (CRT), and it could only support monochrome display. The screen looked black, and white characters on a black background or green characters on a black background were everyday in the computer industry.It wasn’t until the invention of the color display in the 1980s and after the Microsoft Windows system went online that the black background display exited the mainstream.Apple introduced the Macintosh personal computer in 1984, and for the first time released a graphical user interface, which opened the mainstream of computer screen white display.The herd effect of the industry’s chasing of the dark mode further exacerbates and magnifies a long-held opinion: light screens are hampering vision health.But that is not the case.Euna Koo, an ophthalmologist at the Stanford Byers Eye Institute, told CNN Business: “Given the data provided in the research literature, I don’t think dark mode will affect eye health in any way.” When it comes to this dark mode,When it comes to eye fatigue and potential eye health effects, the use time may be more important than the brightness mode or intensity of the device.If you have astigmatism symptoms, dark mode may make you look harder on the screen.According to the American Optometry Association, most people’s eyes suffer from astigmatism to some extent, but usually don’t attract attention.According to the American Academy of Ophthalmology, astigmatism is present in every three Americans, and 150 million Americans need to wear glasses to correct their vision; clinical tests conducted by the Hong Kong Polytechnic University on more than 2,700 people have found that in the age of 21, 30Nearly 40% of people suffer from astigmatism above 100 degrees.A 2014 study by the University of British Columbia’s Sensory Perception and Interaction Research Group showed that the white background in the screen acts as a “crutches” for astigmatism eyes, and the iris shrinks more in bright displays (white background),This reduces the effect of “anamorphic” lenses.For astigmatism patients, black text on a white background has the best readability, so it has the best comprehension and retention, especially when reading for a long time, the experience with a light background will be better.Susan Meyer of the University of Passau in Germany also did a test.Participants in the study were asked to read either positive (black text on white background) or negative (white text on black background) text on the screen.Participants then perform basic proofreading tasks, such as finding spelling or grammatical errors.Researchers also measured the reading speed of participants in each mode.The result is that all participants perform better under positive conditions, they detect more errors and read faster.A 1983 article titled “Improving the clarity of visual display units through contrast inversion” published in the “Computer Science” magazine in 1983 stated through experiments that when using dark characters on a light background, they participatedThe accuracy of the reader when reading the text increased by 26%.The above study by the University of British Columbia found that in the dark display (black background), the iris opens to receive more light, and the distortion of the lens creates a more blurred focus on the eye, so when you see it on a dark screenWith light text, the edges seem to seep into the black background, which is the so-called “halo effect”.Although the dark theme may be more suitable for use in low light environments such as night, it may not help to read better, and for astigmatism patients, it may also increase visual fatigue.But technology companies believe that the dark mode is more conducive to creating an immersive experience for users, especially for visual entertainment applications.‍‍Like the night-time function of “turning off the lights” launched by video websites very early, the only focus in the dark screen is the TV series you are on demand; and music, video, and game platforms such as Spotify, Netflix and Steam, earlyThe design concept of the night mode was adopted from the beginning.By using the dark mode, Spotify can make you look at colorful, vibrant album covers and video thumbnails. The dark mode makes the latter pop up in a specific way that the light mode cannot pop up, attracting users’ attention.No trivial color.The dark colors represented by black are often associated with mysterious, high-level, gorgeous and other emotional reactions.QuickSprout research shows that color can affect 90% of product evaluations; digital marketing expert Neil Patel points out that customers will determine the look and feel of a product within 90 seconds, of which color is the determining factor of 62% -90%, and 85% The reason for buying a product is from color preference.The main reason people have preconceptions about light-colored screens is the fear of “blue light.”Adam Olt’s interpretation of blue light in his book “Can’t Stop It” is quite representative: “For thousands of years, blue light was only available during the day. The candles and firewood produced red and yellow light, and there was no artificial light at night.Lighting. Fire light is not a problem, because the brain interprets red light as bedtime. Blue light is completely different because it is a sign of the morning. Therefore, 95% of us playing mobile phones before going to bed are actually telling the body ‘newThe day begins, which induces a sense of jet lag. “Blue light is one of the blue segments in the spectrum, with a wavelength range of about 400-500 nanometers. Blue light is visible light with a short wavelength and strong energy.From light-emitting diodes (LEDs), xenon lamps, energy-saving lamps to screens, modern life is almost enveloped by blue light.On the official website of the German optical company Zeiss, Blu-ray is also divided into two evaluations: “The advantage is that when the external environment becomes bright, that is, there is more blue light, the body releases serotonin-it is one of the happy hormones and the cortexAlcohol—This is a stress hormone. These two hormones keep us awake and full of energy. They are also used in the treatment of winter depression and insomnia. But too much ultraviolet light and blue-violet light may cause damage to the naked eye.In addition to causing uncomfortable inflammation of the conjunctiva and cornea, it can also damage the lens of the eye (such as cataracts), and especially harm our retina (macular degeneration). “However, daily news reports are more concerned about the negative effects of blue lightEffect, which also aroused the attention of the academic community on blue light.A 2019 study published in the journal Aging and Mechanisms of Disease by a professor of biology at Oregon State University, Jaja Gibutovich, suggests that fruit flies exposed to blue light every day appear in the retinaCells and brain nerve cells are damaged, and exercise capacity is also affected.The lifespan of Drosophila exposed to filtered blue light is slightly reduced, while the lifespan of Drosophila exposed to blue light is greatly reduced.However, the exact impact of blue light on human health has not yet been determined.In most cases, what really helps you avoid eye fatigue is not to stare at the screen all day, instead of tangling in dark or light mode.References: https://knowledge.insead.edu/blog/insead-blog/dark-shirts-and-symbolic-management-2798 https://www.semanticscholar.org/paper/Improving-the-legibility-of-visual-display-units-Bauer-Cavonius / 0780321025dd1c5c0afecd0dd5c27296699d9477https: //www.vice.com/en_us/article/ywyqxw/apple-dark-mode-eye-strain-battery-lifehttps: //www.androidauthority.com/dark-mode-1046425 / https: //www.aao.org/newsroom/eye-health-statisticshttps: //www.zeiss.com.cn/vision-care/better-vision/understanding-vision/blue-light-the-good-and-the-bad.htmlhttps: //www.phonearena.com/news/Dark-Mode-iPhone-Android-interface-feature-pros-cons-versus-light-mode_id116978.

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