How to use the desk lamp

Many parents buy eye protection lamps for their children in order to protect their eyesight. In fact, there is still a lack of conclusive and scientific evidence whether these lamps have the effect of protecting eyesight. Therefore, the key to protecting eyesight is to learn to use table lamps correctly, rather than relying on eye protection lamps. Let's learn how to use table lamps correctly:
First, the degree of the bulb should be appropriate. If the degree is too low, the light shining on the book is dim, and it is not easy for us to see the handwriting clearly, which will cause visual fatigue and myopia over time. At that time, the treatment of myopia will become a daily must. If the degree of the bulb is too high, the excessive light will be reflected into our eyes through the white paper surface, causing glare, causing the pupil to continue to shrink, and then causing eye pain and headaches. Generally speaking, the brightness of 25-45 watt incandescent lamps is most suitable.
Second, the height of the table lamp is also very important. Usually, when the eyes are 30 cm away from the book, the handwriting can be seen clearly without excessive fatigue. Based on this, it is more appropriate to calculate that the height of the desk lamp is 40-50 cm from the book, which can ensure sufficient reading lighting and a certain brightness of the surrounding environment.
If the desk lamp is too low, the light will be irradiated to a too small range, and the surrounding will be dark. Without the reference for distant vision, the eye adjustment system will be in a tense and compressed state of only looking at the near, which is easy to cause eye fatigue and accumulate quickly, causing "light source myopia". If the desk lamp is too high, the light will directly shine into our eyes and produce glare; at the same time, the strong light at close range will also cause light retention on the retina, which will cause the eye muscles to tighten and accelerate the decline of vision, so the knowledge of treating myopia should also be mastered.
Third, the size of the bulb should match the lampshade, and it should be ensured that the bulb is just covered in the lampshade to avoid direct light to our eyes.
Fourth, use white bulbs. Scientific research has confirmed that our vision is best under white light, so choose incandescent lamps or frosted lamps that emit soft and uniform white light instead of colored bulbs.
Finally, the placement of the desk lamp also has a great impact on vision. Because most people write with their right hands, the desk lamp should be placed in front of the left side of the body. When writing, there will be no shadow on the paper due to the hand blocking it, and the light shining on the paper will not be reflected into our eyes and cause glare, so as not to affect vision and cause myopia and other problems.