Why do I cry when I surf the Internet in Internet cafes?

There are many people who often use computers, and their eyes will have symptoms such as acid, pain and tears, and even worse, their eyesight will decline. All these uncomfortable symptoms are signs of eye self-protection, indicating that the eyes are hurt and need protection. If we ignore these symptoms, the result will further damage our vision, which is usually incurable.

Long-term use of computers has become the main cause of visual impairment at present. Many people use eye drops, buy anti-radiation screens or wear anti-radiation glasses, or eat health products to protect their eyes. Which way can protect their eyes more effectively? Let's use professional medical research literature to reveal the truth of computer eye injury. When everyone knows the truth, we can really protect our eyes effectively.

Computer background light is the enemy of eyes.

According to the latest survey of the authoritative German computer magazine Macwelt, although the radiation of LCD screen is much smaller than that of ordinary display screen, it is easier to make our eyes tired and may even lead to symptoms such as headache because of its high brightness. Researchers pointed out that when the brightness of the display reaches [AD] 100cd per square meter (that is, the unit of luminous intensity "Candeira"), it has already had a certain impact on the eyes. However, the luminous intensity of the LCD screens they tested exceeded 300cd per square meter, and some even reached 400 CD-500 CD.

Dr. Wei Haien, a German computer expert who presided over the survey, said that this problem exists not only in LCD computers, but also in LCD TVs. In order to improve the definition, these LCD screens not only rely on the lamp behind the screen to improve the brightness, but also generally use special "polishing technology" to make the display surface look like a piece of glass, which is very textured, and also improve the color contrast and saturation of the screen. However, it also reflects light like glass. Especially when light hits the screen, it will increase the light reflection. Consumers who use this kind of display screen are easy to be "stabbed" by light, and have symptoms of eye fatigue, which will gradually lead to health problems such as decreased vision and headache.

Experts complain about artificial light sources such as LED and computer.

Following the seventh annual meeting of the International Lighting Association (ILA) held in Amsterdam, the Netherlands, a seminar on "Light-Color-Health" was held in Vienna, Austria on122 and 23 October (10). Scholars and doctors from more than 20 countries made reports. Lubeck in Sweden, Alexandria in Germany? 6? 1 A. Wunsch, martel of Canada and other top optical masters attended and published important research reports. Lee Chad? 6? 1 r. h. w. Funk's report points out that when "inappropriate light" continuously irradiates our eyes, it will cause dysfunction, especially the light emitted by LED lamps and computer screens, which contains a lot of high-energy short-wave blue light with irregular frequency. These short-wave blue lights are extremely energetic and can penetrate the lens to reach the retina. Blue light irradiation on retina will produce free radicals, which will lead to the decline of retinal pigment epithelial cells, and the decline of epithelial cells will lead to the lack of nutrients in photoreceptor cells, thus causing visual damage. Professor Feng Ke pointed out that these "inappropriate lights" are the chief culprit of a large part of senile blindness-macular disease (AMD). Professor funk's report caused a great response, which made people start to think calmly about the harm of such invisible killers around them.

Therefore, there are two main ways to solve the computer injury to the eyes:

1 Eliminates the excessive blue light and ultraviolet light contained in the spectrum emitted by the computer screen.

Eliminate electromagnetic screen stroboscopic, namely CVS.

Countermeasures:

1. Take a regular rest to avoid using your eyes for a long time: every hour, keep your eyes away from the computer and relax to relieve eye fatigue.

2, filter blue light, wear computer protective glasses that can filter blue light, such as Hello computer glasses in Germany: computer blue light is the root cause of eye fatigue and visual cell damage, so it is necessary to filter blue light to eliminate the damage of continuous blue light radiation. Filtering blue light can not only eliminate symptoms such as eye pain when watching a computer, but also relieve eye fatigue. More importantly, it can prevent blue light from damaging visual cells.

At present, most scholars believe that filtering blue light can reduce the incidence of apoptosis and retinal degeneration. In the study of patients after cataract surgery, it is confirmed that yellow intraocular lens can effectively absorb a large amount of blue light by filtering blue light, and prevent macular degeneration caused by blue light directly on the retina [8]. For us normal people, using glasses that filter blue light is the most effective way to prevent blue light damage. Ordinary anti-radiation glasses can only filter ultraviolet rays, but not blue light. Specially made yellow anti-blue glasses can not only effectively isolate ultraviolet rays, but also filter more than 90% of blue light, which is suitable for outdoor use and watching computers or televisions, and can greatly reduce the irritation of blue light to eyes, eliminate discomfort symptoms such as sore eyes, fever or pain, and relieve eye fatigue.

3. Antioxidants and free radical scavengers: Blue light will cause photooxidation reaction and produce too many free radicals to damage photoreceptor cells, so it is necessary to supplement substances with antioxidant effects, such as anthocyanins and vitamin C in fruits. The free radical scavengers used in clinic include dimethyl thiourea and high-dose allopurinol, which can effectively protect the retina from blue light injury. In addition, the use of powerful antioxidants, such as butylated hydroxytoluene and vitamin E, against retinal oxidative damage can alleviate retinal blue light damage to some extent.

4. Protector of enzyme activity: Studies show that lutein and zeaxanthin have the function of protecting cytochrome oxidase and protecting retina from blue light damage.

5. Optic nerve protectant: Common optic nerve protectants such as vitamin B 1 and mecobalamin. It plays a role in nourishing and supporting the optic nerve.