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One question and one answer to tell you "how scary blue light is", do you know?

Posting time:2022-12-02 06:23:35

One question and one answer to tell you "how scary blue light is", do you know?

With the development and progress of society, electronic products have become the necessities and necessities of people's lives. Ubiquitous electronic screens fill our life, study and work. Over time, vision and eye health are gradually facing huge risks and challenges! The damage of blue light to the retinal cells of the human eye is an important factor that causes blurred vision in children. The harm of blue light is so terrible. Today we will find out: Is blue light harmful to the human body? Correct answer: Of course, light can be divided into two categories: visible light and invisible light. The wavelength of visible light ranges from 380nm to 760nm. Among them, the light in the range of 380nm to 500nm is perceived by our retina as blue, so it is called blue light. Because of its high energy, "blue light" spreads more widely in the atmosphere than any other visible light (Rayleigh's law of physics). Whether it is visible light or invisible light, the shorter the wavelength, the stronger the energy and the greater the hazard. Can the blue light of LEDs cause damage to the retinal cells of the eye? Correct answer: don't worry The first thing to admit is that blue light does harm retinal cells because it can penetrate the lens to reach the retina, causing optical damage and accelerating the oxidation of cells in the macula. However, harmful blue light does not mean that the use of LED lights will inevitably lead to damage. The damage is related to the amount of blue light accumulated, and the cornea, lens and vitreous of the eye will absorb a certain amount of blue light, which can protect the retina from blue light. At present, the peak spectrum of regular LED light sources is basically in the range of 450-470 nanometers, and the illuminance of conventional light environment generally does not exceed 600lx (lux, illuminance unit), and LED lighting fixtures will be structurally packaged outside the LED light source, so It can be said that the LED lighting fixtures produced by most regular manufacturers will not cause damage to the retina. According to the current domestic blue light photobiological safety standards, Class 0 (non-hazardous) and Class 1 (low-risk) products are safe to use, and special groups such as infants and young children should use Class 0 products. It is recommended that when purchasing LED lights at home, you should first look for products from regular manufacturers; secondly, choose soft, warm colors that are yellowish, and the color temperature of indoor LED lighting products should not exceed 4000K; in addition, pay attention to the installation angle of the light source and try to avoid shadows. How much damage do TVs, computers, mobile phones, and tablets do to the eyes? Correct answer: The irreversible damage to vision from daily exposure to blue light is a chronic accumulation process rather than an acute damage. Blue light is ubiquitous in our lives. Except for LED lights, the LCD screens of digital products such as mobile phones and tablet computers all have blue light. If you are exposed to blue light for a long time and a lot, such as keeping your mobile phone and tablet computer in your hands all day, this unhealthy eye habit continues, and the chance of blindness caused by cataract and macular degeneration is relatively high. The damaging effect of high-energy blue light in mobile phones and tablet computers is a chain reaction, first causing the death of light-sensitive cells, then causing macular degeneration, and then leading to gradual decline or even complete loss of vision, and this damage is often irreversible. In addition, the most likely harm caused by high-energy blue light is mainly reflected in: aggravating macular disease, causing fundus damage after cataract surgery, causing blurred vision, causing visual fatigue, and causing glare. In addition, blue light can also inhibit the secretion of melatonin, disturb sleep, and increase the incidence of major diseases. The extent to which blue light is harmful to the eyes varies with age. In older people, the crystals will turn yellow with age; children, sensitive to strong blue light, will cause vision loss and even eye diseases. It is worth noting that in real life, we generally do not look directly at LED lights, but it takes a long time to look directly at mobile phone and computer screens. Only by developing good eye habits can we effectively reduce blue light damage to the eyes. Is it possible to block all blue light? Correct answer: It is impossible that although blue light is harmful to the eyes, it also has a beneficial side. For example, the reason why we humans can feel the colorful and colorful world, blue light plays a key role; in addition, blue light also contributes to the formation of the human body's biological clock. Need blue light blocking lenses for protection? Correct answer: The required investigation proves that the most harmful to the eyes is in the range of 415-455 nanometers, and the blue light in this range needs to be blocked. Wearing effective blue light blocking lenses is key. The so-called effective means that the blue light cannot be completely blocked, but part of the blue light that is harmful to the eyes is blocked.
This article is reproduced in: Eyes Bright Eyes (WeChat Public Account) will tell you one question and one answer [How scary blue light is] Do you know? Follow us to get more eye health knowledge

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