Blue light radiation harm causes human blindness

First, why do you use your computer for a long time, and your eyes will experience symptoms such as fatigue, dryness, and tingling?

The main reason is high-energy short-wave blue light

All these uncomfortable symptoms are a sign of self-protection of the eye. These signals mean that the eye is already hurt and needs protection. If we ignore these symptoms, the consequences are further damage to vision, which is usually drug-free.

Professor RHW Funk, a German ophthalmologist, pointed out that when "inappropriate light" continues to illuminate our eyes, it can cause dysfunction, especially when LED lights, computer screens, etc. contain a lot of irregularities. High-energy short-wave blue light of frequency. These short-wave blue light have extremely high energy and can penetrate the lens to reach the retina, causing photochemical damage to the retina, directly or indirectly causing damage to cells in the macular area.

Therefore, for normal people, blocking long-time exposure to blue light is the most effective way to reduce damage, and the use of anti-blue light glasses can effectively solve this problem. Ordinary radiation-proof glasses can only filter ultraviolet rays and certain electromagnetic radiation. Cannot filter blue light. Special anti-Blu-ray glasses can not only effectively isolate ultraviolet rays and radiation, but also filter more than 90% of blue light. It is suitable for use when watching a computer or TV. It can greatly reduce the stimulation of blue light on the eyes and eliminate the symptoms such as soreness, fever or pain in the eyes. Relieve eye fatigue.

Second, what is blue light

Blue light is high-energy visible light with a wavelength of 400 to 500 nm.

Third, the harm of blue light

1, blue light will increase the disease of the macular area of ​​the retina

Blue light causes an increase in the amount of toxins in the macula in the eye, which is a serious threat to our fundus health - from the 2010 Academy of Ophthalmology. With the increase of age, the lipofuscin (cell debris) left by phagocytosis of retinal pigment epithelial cells ) will gradually accumulate in the retinal pigment epithelial cell layer, which will make the retina more sensitive to chronic light exposure. Blu-ray will aggravate macular problems caused by genetics, nutrition, environment, healthy habits and age-related relationships. After prolonged exposure, the toxicity of the retina will increase with the shortening of the wavelength, thereby aggravating the disease in the macula.

Exposure to high-intensity (ultraviolet A, ultraviolet B, and blue light) light for a prolonged period of time increases the incidence of macular degeneration by a factor of two. Our findings show an increased risk of exposure from high exposure to daylight exposure, emphasizing the importance of protection in European populations. Augood, c. et al. age-related maculopathy and macular degeneration inelderly european populations: the eurye study, 2004.

2, blue light can cause fundus damage after cataract surgery

As the age increases, the lens of the human body will gradually turn yellow. This helps to filter blue light. However, after cataract surgery, the patient loses these natural barriers. Blue light will reach the retina and damage the retinal pigment epithelial cells, seriously affecting the health of the fundus.

3, blue light can have blurred vision, leading to visual fatigue, causing VDT syndrome

After the blue light enters the fundus and is focused, the focus does not fall on the retina, but falls between the retina and the lens. This increases the distance of the chromatic aberration in which the light is focused in the eye. The distance between the focal points in the eye is the main cause of blurring of the vision, so the injection of blue light will aggravate the chromatic aberration and visual ambiguity. When the eye muscles are too tight, the blood supply to the eyes is excessively tight, and the blood supply to the eyes is strengthened. Thereby aggravating fatigue.

4, blue light can glare

The blue light has a high energy between 400 nm and 500 nm. Light with higher energy has a higher probability of scattering when it encounters fine particles in the air, and blue light becomes the main cause of glare.

5, Blu-ray can predict the secretion of melatonin, disturb sleep, and increase the incidence of major diseases!

The speed that affects the body's biological clock is called melatonin. It is secreted by the pineal gland in the brain. Under the illumination of 1.3 lux blue light, the secretion of melatonin will end, and our commonly used energy-saving lamp, Ipad The intensity of blue light emitted by computers and mobile phones is close to the intensity of blue light in the midday sun, and the glasses are very close. At this time, the damage of blue light to the retina and the secretion of melatonin have far exceeded the illumination intensity of 1.3 lux blue light. . Because blue light stimulates the brain, inhibiting melatonin secretion and increasing the production of adrenocortical hormone, thereby destroying the hormone secretion balance directly affects sleep quality.

Harvard University research shows that if you use ipad, smartphone or laptop before going to sleep, they emit enough light to stimulate the brain, making the brain excited, affecting the law of the biological clock, it takes too long to fall asleep, and wake up many times during sleep. Come to wait for insomnia symptoms. The human body begins to secrete a large amount of melatonin at nine or ten o'clock in the evening, and the amount of light secretion is greatly reduced, and this hormone is also important for anti-cancer function.

At the same time, sleep well does not mean that all organ systems are prone to dysfunction. Studies have found that people with insufficient sleep or low quality sleep have significantly reduced immune function, responsiveness, memory and coordination, and have an increased risk of diabetes, heart disease, cancer, obesity, indigestion, constipation, depression and other diseases.

Fourth, where is the blue light in our lives?

Studies have shown that Blu-ray is abundant in computer monitors, fluorescent lamps, mobile phones, digital products, displays, LEDs, etc.