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The brightness of children's desk lamp should not be too low! Damage to the eyes is easy to cause my

No matter at home or at school, children can't do without lamp. Although it's for children's achievement, it's also necessary to protect eyes moderately. Some lamps have the function of protecting eyes and protecting eyesight. But whether these lamps have the function of protecting eyes is still lack of conclusive and scientific evidence. In a word, to protect eyesight, the key lies in learning to use the table lamp correctly. The brightness of the lamp used by children should not be too low! Damage to the eyes is easy to cause myopia!

First, use a white light bulb. Scientific research has proved that our vision is the best under white light, so we should choose incandescent or frosted lamps that can emit soft and even white light instead of color bulbs.

Second, the degree of the bulb should be appropriate. If the degree is too low and the light on the book is dark, it is not easy for us to see the handwriting clearly, which will cause visual fatigue and myopia after a long time. If the light bulb is too high, too strong light will be reflected into our eyes through the white paper, producing glare, making the pupil continuously narrow, and then causing eye pain and headache. Generally speaking, the brightness of 25-45 watt incandescent lamp is the most suitable.

Third, the size of the bulb should match the lampshade, to ensure that the bulb is just covered in the lampshade, to avoid direct light to our eyes.

Fourth, the height of the desk lamp is also very important. Usually, when the distance between the eyes and the book is 30cm, you can see the handwriting clearly, and you will not be too tired. It is estimated that the height of the desk lamp is 40-50cm away from the writing, which not only ensures sufficient reading lighting, but also ensures a certain brightness of the surrounding environment. If the table lamp is too low, the light will be too small, and the surroundings will be dark. The loss of a reference for farsightedness will make all the eye regulating systems in a state of tension and compression, which only looks close to the eye. It is easy to make the eyes tired and accumulate rapidly, resulting in 'light source myopia'. If the table lamp is too high, the light will directly shine on our eyes, resulting in glare; at the same time, the short-distance strong light will cause light retention on the retina, which will make the eye muscle tight and accelerate the decline of vision.

Finally, the position of the table lamp also has a great impact on vision. Because most people write with their right hand, the desk lamp should be placed in front of the left side of the body. When writing, it will not form a shadow due to the cover of the hand on the paper, and the light on the paper will not reflect into our eyes and produce glare.