What is the danger of Blu-ray?
Accelerate visual cell oxidation
Professor Zhao Min from the First Affiliated Hospital of Chongqing Medical University is the director of the Chongqing Optical Optics Association.
Professor Zhao Min said that blue light does not mean blue light, but high-energy visible light with a wavelength of 400-500 nm. It can penetrate the lens and reach the retina, causing optical damage and accelerating the oxidation of cells in the macular area. Blue light is also one of the most harmful visible light to the human body.
Professor Zhao’s statement is not groundless. As early as 2010 at the International Light Association Annual Meeting, the world's top optical experts unanimously pointed out that blue light has extremely high energy and can penetrate the lens to reach the retina. Blue light illuminates the retina and produces free radicals. These free radicals cause the retinal pigment epithelial cells to die. The decline of epithelial cells leads to the lack of nutrients in light-sensitive cells, causing visual impairment, and these damages are irreversible.
Who is the "number one killer"?
Not ultraviolet rays
"In life, many people know that ultraviolet rays and infrared rays can cause damage to children's eyes. In fact, ultraviolet rays and infrared rays are usually absorbed by the cornea and lens, and generally do not touch the retina, and are not the number one killer of baby eyes."
Professor Bai Ji, deputy director of the Department of Ophthalmology at Daping Hospital, said that infants' eyes are most vulnerable to blue light damage. Because the baby's lens is relatively clear, it is difficult to filter blue light. 0-2 years old, about 70-80% of blue light can penetrate the lens to reach the retina; 2-10 years old, about 60-70% of blue light will shine on the retina. Therefore, when treating neonatal jaundice with blue light, doctors must cover the baby's eyes with black cloth to avoid injury.
What other blue light sources?
iPad big screen mobile phone
Professor Bai said that the damage of blue light to the eyes is gradually formed. Even if the child does not look directly at the light source, the eyes will be hurt if the time is long. Therefore, for children, especially those who like to "find bright", it is very important to avoid the damage of blue light.
There are many light sources that can emit blue light in life. Peng Ling, a tester of Chongqing Aicheng Eye Vision Center, introduced that in addition to Yuba, flat panel displays, LED neon lights, fluorescent lights, liquid crystal displays, ipads, large-screen mobile phones, etc., there are background light sources, and the light source excited by the powerful electron flow contains abnormalities. The high-energy short-wave blue light will affect the child's retina and should avoid long-term direct vision.
What other discomfort lights?
Also easy to hurt the body
In addition to blue light, there is still a lot of light in our lives that can cause harm to our bodies.
"The human eye can adapt to a certain range of light radiation due to pupillary adjustment, but when the light radiation increases to a certain amount, it will have an adverse effect on the environment and human health. This is called light pollution." Chongqing Aicheng Eye For example, Peng Ling, an optometrist in the optometry center, prefers to use a higher-color tile to decorate multiple mirrors and whitewash walls. Such an overly bright decorative surface will have a reflection coefficient of light of up to 90%. In such a highly reflective, lacking color environment, the cornea and iris may be damaged, resulting in decreased visual fatigue or vision, increased incidence of cataract, disruption of normal circadian rhythms, and induction of neurasthenia and insomnia.
“When many families choose lamps and light sources, in order to pursue romance and luxury, the lighting is designed to be colorful, which is equally harmful to health,†said Yan Zhaohua, an associate professor of cardiology at Xinqiao Hospital.
Liao Wei, a professor of pediatrics at Xinqiao Hospital, said that “light pollution†has a greater impact on infants and young children, which not only weakens vision but also affects vision development. If children are exposed to excessive light, the secretion of melatonin will be reduced, leading to precocious puberty or excessive genital development.
Not long ago, this newspaper reported that the child bathing under the bath caused serious eye burns. Experts analyzed that the culprit was the blue light emitted by Yuba. Recently, Blu-ray has been attacked again: Jiang Tao, chairman of the Zhejiang Shanpu Lighting Appliance Co., Ltd. and member of the CPPCC National Committee, questioned the fashionable LED lights in the "two sessions" of the province. The reason is that the lamp contains a lot of blue light.
What harm does Blu-ray have? What lighting hazards should you pay attention to in your life? Yesterday, the reporter interviewed the ophthalmologists of the hospitals of the First Affiliated Hospital and Daping Hospital.
Home lighting settings have different emphasis
How is the family best to use the lights? Professor Dai Guangming, a neurology departmental counseling specialist at Xinqiao Hospital, suggested that the lighting in the home should be soft, not too bright or too dark, and should not be dazzled and contrasted. It is best not to use stimulating light colors in the bedroom, and avoid color. Strong contrast, avoid red and green. The color of a room should not exceed 3 colors, and the colors should be coordinated. For the elderly and children, the choice of light source is also different.
It is best not to hang the headlights in the rooms of the elderly, because the old people are used to getting up at night, if they suddenly encounter particularly glaring lights in the middle of the night, it will affect their sleep.
Some older people like to read in bed, so the bedside lamp should be slightly brighter.
The lighting of the old man's room should be warmer, which will make the room very warm and the light source should not be too complicated.
For the children's room, Professor Bai Ji, deputy director of the Department of Ophthalmology at Daping Hospital, said that the use of lighting is related to the health of the child's eyes, so pay special attention to whether it is the highest principle to maintain brightness, whether using white or yellow light. “The focus of each child’s use of the light source is different, and adjustments should be made according to the needs.†Professor Bai said that if preschool children have little demand for reading, they can put bedside lamps on the bedside. Adults can accompany him to read books before going to bed.
In addition, Professor Bai also reminded that many parents like to turn down the light and sleep when the child is asleep. "This is easy to damage the child's vision, and it is easy to have symptoms such as precocious puberty and should be avoided."
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