There has always been an idea that the baby would not watch TV before he was three years old to avoid being nearsighted. However, there are a lot of early education materials, that is, video formats, not to see and not work. What to do? Hear people say that the projector is better and does not hurt the baby's vision. Is this true?
From the imaging principle, most LCD TVs are now LED backlights, which use LED backlights to directly emit light to form images. The human eye captures direct light; most of the projectors are also LED light sources, but they are The light is formed into an image and projected onto an object such as a curtain or wall. The human eye captures the reflected light on the curtain or wall. And when we look at things in the natural world, we usually look at the reflected light. We do not pass direct light. For example, we will not stare at the sun to see, nor will we stare at the light bulb, so that it will hurt our eyes and the objects we see are the reflected sunlight and light. In particular, blue light is the most harmful light to human eyes, and the direct blue light has far more influence on vision than reflected blue light. From this point of view, the projector uses reflected light, which is surely less damaging to the vision than the television uses direct light.
Note: There is no single white light in nature. It is a mixture of blue light, green light and yellow light. The blue light has the highest energy, and it has great lethality to the retina, causing people to form myopia or even macular degeneration. Blu-ray is widely found in sunlight, electronic screen light, computer monitor light, and mobile phone screen light, so it is easier to play myopia by playing with various electronic devices.
In addition, LCD TVs generally have a flickering phenomenon. This is not the same as the previous CRT display flashing, nor is it the refresh rate of the liquid crystal display that we commonly refer to as 60HZ. In fact, the refresh itself does not cause the screen to flicker. The flicker is purely the dimming and flickering of the LCD monitor in order to adjust its brightness. However, the projector does not have this problem, ah, there is no dimming flicker, so the visual impact is much smaller.
So, should you replace the TV with a projector? Is it not easy for my baby to have myopia? This is not absolute, because if the projector is used improperly, it will cause more eye damage than the TV! The image of the TV is relatively clear, but whether the image of the projector is clear depends on three aspects. One is a lens, the lens is not a realistic image of the natural will not be clear; one is a wall or a curtain, if the wall is pitted, the screen is wrinkled, the effect of the projection is naturally poor; one is adjusted, if not adjusted, the projector is clear Degree is also greatly affected. Once the image is not clear, the muscles of the eye become more tense, but it is more likely to cause eye fatigue and eventually form myopia or dry eye.
Say so many projectors and television comparison, in fact, I would like to say is that whether it is a TV or a projector, watching more is very easy for my baby myopia. Because the baby's eye muscles and retina are still in the process of development, their ability to regulate itself is not very good, and watching a projection or television screen is not a static picture, is a constantly changing video screen, so it is difficult for your baby to adapt, Very easy to cause visual fatigue, a little longer time is easy to cause myopia.
Secondly, whether it is a TV or a projector, it is a close-range watch for the baby. If the degree of close-range watching is too strong and the duration is too long, it may easily cause tension or adjustments. Can not relax regulation, resulting in decreased vision.
Therefore, to prevent baby's nearsightedness, it is more necessary to look at the projection in a short time, and take the baby to an open field of vision so that the eye can be fully rested.
From the imaging principle, most LCD TVs are now LED backlights, which use LED backlights to directly emit light to form images. The human eye captures direct light; most of the projectors are also LED light sources, but they are The light is formed into an image and projected onto an object such as a curtain or wall. The human eye captures the reflected light on the curtain or wall. And when we look at things in the natural world, we usually look at the reflected light. We do not pass direct light. For example, we will not stare at the sun to see, nor will we stare at the light bulb, so that it will hurt our eyes and the objects we see are the reflected sunlight and light. In particular, blue light is the most harmful light to human eyes, and the direct blue light has far more influence on vision than reflected blue light. From this point of view, the projector uses reflected light, which is surely less damaging to the vision than the television uses direct light.
Note: There is no single white light in nature. It is a mixture of blue light, green light and yellow light. The blue light has the highest energy, and it has great lethality to the retina, causing people to form myopia or even macular degeneration. Blu-ray is widely found in sunlight, electronic screen light, computer monitor light, and mobile phone screen light, so it is easier to play myopia by playing with various electronic devices.
In addition, LCD TVs generally have a flickering phenomenon. This is not the same as the previous CRT display flashing, nor is it the refresh rate of the liquid crystal display that we commonly refer to as 60HZ. In fact, the refresh itself does not cause the screen to flicker. The flicker is purely the dimming and flickering of the LCD monitor in order to adjust its brightness. However, the projector does not have this problem, ah, there is no dimming flicker, so the visual impact is much smaller.
So, should you replace the TV with a projector? Is it not easy for my baby to have myopia? This is not absolute, because if the projector is used improperly, it will cause more eye damage than the TV! The image of the TV is relatively clear, but whether the image of the projector is clear depends on three aspects. One is a lens, the lens is not a realistic image of the natural will not be clear; one is a wall or a curtain, if the wall is pitted, the screen is wrinkled, the effect of the projection is naturally poor; one is adjusted, if not adjusted, the projector is clear Degree is also greatly affected. Once the image is not clear, the muscles of the eye become more tense, but it is more likely to cause eye fatigue and eventually form myopia or dry eye.
Say so many projectors and television comparison, in fact, I would like to say is that whether it is a TV or a projector, watching more is very easy for my baby myopia. Because the baby's eye muscles and retina are still in the process of development, their ability to regulate itself is not very good, and watching a projection or television screen is not a static picture, is a constantly changing video screen, so it is difficult for your baby to adapt, Very easy to cause visual fatigue, a little longer time is easy to cause myopia.
Secondly, whether it is a TV or a projector, it is a close-range watch for the baby. If the degree of close-range watching is too strong and the duration is too long, it may easily cause tension or adjustments. Can not relax regulation, resulting in decreased vision.
Therefore, to prevent baby's nearsightedness, it is more necessary to look at the projection in a short time, and take the baby to an open field of vision so that the eye can be fully rested.