What kind of light is good for the eyes?
Nov 11, 2021
Have you found that watching a computer or TV at the same time in a different indoor environment, the fatigue of the eyes is different? If you simply think that watching TV or watching the computer makes yourself myopia, then you are a bit wronged. In fact, the lights around you are also an accomplice of hurting your eyes!
Yellow light is the healthiest of all lights
"Spectrum" refers to the pattern in which the dispersed monochromatic light is arranged in sequence according to the wavelength (or frequency) after the polychromatic light is split by the dispersion system. Our common color spectrums are red, orange, yellow, green, blue, indigo, purple, etc. The most harmful to the eyes is purple light.
Violet lights installed in the community to kill mosquitoes, arc light emitted during electric welding, ultraviolet light, etc., are the most harmful to the eyes. Long-term exposure to the eyes is prone to acute damage, causing the corneal epithelium to fall off, and some age-related macular degeneration also Related to excessive exposure to ultraviolet light.
Secondly, it is red light, like the dark red flames that steel workers see in steel furnaces.
And the least harmful to human eyes is yellow light. The most common yellow light is the faint yellow light emitted by the incandescent lamp used in the home. Incandescent lamps have been eliminated by national regulations because 90% of their energy is converted to heat and only 10% is converted to light energy. However, it is indeed the light that does the least damage to the eyes.
Fluorescent lamps, energy-saving lamps, LEDs are all harmful to the eyes
Although incandescent lamps are the least harmful to the eyes, they have been clearly eliminated because they do not save energy. So, what about all kinds of fluorescent lamps, energy-saving lamps, LED lamps and other lamps on the market?
Although incandescent lamps do not save energy, they do not harm the eyes. Fluorescent lamps, namely electric rod tubes, fluorescent lamps, etc., emit mainly white light, which gives people the intuition that they are very bright, but the reflections are too strong, which can easily induce visual fatigue after a long time.
For energy-saving lamps and LED lamps, the white light emitted by the energy-saving lamps is not good for the eyes. If there is still purple light in the observation with an angular mirror; the energy saving of LED lamps is its advantage, and there is no problem with short-term use, but long-term use is not good for the eyes. good.
Nowadays, most homes, offices, and public places use fluorescent lights. If the surrounding environment is white, it will produce strong reflections under fluorescent lights, which will easily induce visual fatigue and even myopia over time.
What color of light is better for the eyes when reading?
Generally speaking, when people read, the most commonly used lights are fluorescent lamps, light bulbs and yellow sun lamps. In principle, readers only need to sit upright and have good reading habits; then according to personal habits, no matter which color of light is selected, it will not cause great damage to the eyes.
But for comparison, the fluorescent tube glows through constant flicker; the degree of instability of this flicker far exceeds that of sun lamps and light bulbs. It is like when watching TV, the picture is composed of many pictures that are continuously connected and combined.
The pupils of people’s eyes will tremble because of such flashes, constantly zooming in and out; therefore, it is better to use a sun lamp or a light bulb when reading.
After intense study or work, you might as well look at the trees in the distance from the window, the nervous nerves will be relaxed, and the fatigue of the eyes will disappear.