On the harm of various screen mobile phones, iPads and computers to eyes!!

Abstract: with the increase of age, lipofuscin left by phagocytosis of retinal pigment epithelial cells will gradually accumulate in the retina, causing macular disease. After long-term exposure, the toxicity of retina will increase with the shortening of wavelength, which will aggravate the macular disease.

nowadays, mobile phones, iPads, computers and other electronic products have gradually become an indispensable part of people’s life. Therefore, in recent years, a new term appears more and more in everyone’s vision – Blu ray. According to relevant data, at present, blue light and radiation cause blindness to more than 30000 people around the world every year, while 63.3% of China’s 420 million Internet users have eye diseases of varying degrees, such as vision loss, cataract, astigmatism and blindness, due to blue light and radiation. It can be said that the harm of blue light to human beings has already surpassed Sudan red, melamine and DDT.

why do long-term use of three primary color desk lamps and computers cause eye fatigue, dryness and tingling? The main reason for

and

is high-energy short wave blue light. The so-called blue light refers to the light with relatively high energy whose wavelength is between 400nm-480nm. Blue light in this wavelength will increase the amount of toxin in the macular region of the eye, which seriously threatens people’s fundus health. The reason why the artificial lamp source can form white light is to excite the phosphor by blue light with the wavelength of 450nm-455nm. The lower the wavelength, the stronger the excitation ability. Generally, 450nm-460nm belongs to the band with the strongest radiation damage. Therefore, when the human eye contacts these light sources for a long time, it will be damaged by blue light and radiation. The symptoms of eye discomfort are a signal of eye self-protection. These signals mean that the eyes have been injured. If we ignore these signals, we may cause irreversible damage to the eyes.

specific harm of blue light

1. Blue light will aggravate retinal macular disease

. With the increase of age, lipofuscin left by phagocytosis of retinal pigment epithelial cells will gradually accumulate in the retina, causing macular disease. After long-term exposure, the toxicity of retina will increase with the shortening of wavelength, which will aggravate the macular disease.

2. Blue light can cause visual blur, visual fatigue and VDT syndrome.

blue light enters the fundus of the eye. After focusing, the focus will not fall on the retina, but between the retina and the lens. This increases the chromatic difference distance of light focusing in the eye, and the distance between intraocular focal points is the main reason for the blurring of vision. Therefore, the direct injection of blue light will directly lead to excessive tension of eye muscles, strengthening of blood supply and paying more attention to fatigue.

how can we protect ourselves in the face of blue light Keep a comfortable and suitable distance between the computer and the face (basically close to the length of our arms), while avoiding getting closer and closer during work.

2. When using the mobile phone, stay away from your eyes as far as possible. You should know that the farther your eyes are from the screen, the less visual fatigue will be caused. Alternatively, the content of the screen can be enlarged to a distance suitable for viewing;

3. Rest for 20 seconds every 20 minutes and look at things in the distance or 20 feet away. This is the so-called “20-20-20 rule”. In addition, use your hands to relax the muscles around your eyes. In addition, close your eyes and rotate your eyes to completely relax your eyes;

4. Check the eyes frequently. Even small problems can make visual fatigue lead to vision loss. At the same time, consult ophthalmologists and ophthalmologists at the eye health center, and wear glasses that are most suitable for your reading.