Many parents buy eye lamps for their children in order to protect their eyesight, but there is still a lack of conclusive, scientific evidence about whether these lamps and lanterns have eye protection effects. So, want to protect eyesight, the key depends on learning to use desk lamp correctly, not blindly send hope to protect eye lamp. Then how to use desk lamp correctly, let's understand together:
First, the light bulb should have the right degree. If the degree is too low, the light on the book is dark, we are not easy to see the handwriting, this will cause visual fatigue, a long time will also lead to myopia, when the treatment of myopia has become a must do every day. If the light bulb is too strong, too much light will bounce back into our eyes through the white paper, causing glare and continuous narrowing of the pupils, which can cause eye pain and headaches. In general, 25 -45 watt incandescent bulbs are the best.
Second, the height of desk lamp is also very important. Usually, when the eyes are 30 centimeters away from the book, they can see the writing clearly and will not be too tired. According to this calculation, the height distance of the desk lamp is 40-50 centimeters from the written form. It is more appropriate to ensure adequate reading lighting and certain brightness of the surrounding environment.
If the lamp is too low, the light will reach too small and the surrounding area will be dark. Lost the reference that can offer farsighted, can make eye ministry each adjust system is in the tension that sees near place only compresses state, make eye fatigue easily, accumulate rapidly, cause "illuminant sex myopia". If the lamp is too high, the light will hit our eyes directly, creating glare. At the same time, close distance strong light will also cause light retention phenomenon on the retina, will make eye muscle contraction, accelerate vision decline, so usually to the treatment of myopia knowledge also want to have a grasp.
Third, the size of the bulb should match the lampshade and make sure the bulb is placed inside the lampshade to avoid direct light into our eyes.
Fourth, use white light bulbs. Scientific research confirms that our vision is best in white light, so opt for an incandescent or frosted light that produces a soft, even glow rather than a color bulb.
Finally, the position of the lamp also has a great impact on vision. Because most people write with the right hand, so, desk lamp should be put in front of the body left, writing will not be because of the hand block on the paper to form a shadow, according to the light on the paper will not be reflected to our eyes and produce glare, such ability will not affect the vision and cause myopia and other problems.
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