The origin of anti-blue light
Anti-blue light skin care products With the wave of Estee Lauder's anti-blue light eye cream, there was a storm of "anti-blue light" on the market, but people have different views on the hot topic of "anti-blue light".
As early as 1966, Nell et al. Found that irradiation with blue light can cause damage to retinal cells, leading to decreased vision or even loss of vision. At the 2010 annual meeting of the International Light Association, the world ’s top optical experts unanimously pointed out that short-wave blue light has extremely high energy and can penetrate the lens directly to the retina. Blue light irradiates the retina to generate free radicals, and these free radicals can cause the death of retinal pigment epithelial cells. The death of epithelial cells can cause the lack of nutrients in light-sensitive cells and cause vision damage. These damages are irreversible.
In December 2017, Xia Aiting and Tian Yan from the Department of Dermatology of the General Hospital of the People's Liberation Army Air Force published a paper entitled "Research Progress in Damage to Skin and Its Protective Agents by Blue Light" in the Journal of Lighting Engineering, which made brands smell blue skin care Protected business opportunities.
In order to figure out "anti-blue light", we must figure out what blue light is and what harm it has.
So, what is Blu-ray?
Short-wave blue light is light with a relatively high energy between 400nm and 480nm. Here is a special point. Blue light is not all harmful blue light. What is really harmful is blue light within 400 to 440, and blue light between 480 and 500 nanometers has a function of regulating biological rhythms. Sleep, mood, memory, etc. Related to this, it is beneficial to the human body.

High-energy blue light with a wavelength of 400 to 500 nanometers is commonly found in computers, mobile phones, projectors, LED displays, laser pens and other electronic devices. The blue light in this wavelength will increase the amount of toxins in the macular area of the eyes, seriously threatening us. Fundus health is the most harmful to the retina, and the most serious can cause blindness.

When it comes to the dangers of blue light, many people know that it can cause eye fatigue, dryness, and affect vision health. But maybe you don't know that blue light will "invade" the skin.
What harm is blue light to the skin?
1. High-energy blue light will promote the production of more active oxygen radicals in epithelial cells, which will accelerate skin aging, resulting in inelastic skin and increased wrinkles.
2. Research shows that because blue light has a longer wavelength than ultraviolet light, it can penetrate deep into the skin, causing oxidative damage to cellular DNA, reducing the production of collagen and elastin, causing skin problems such as enlarged pores and dark circles.
3. Blue light also stimulates the brain and inhibits melatonin secretion. The reduction of melatonin not only affects normal sleep, but also increases skin melanin production.
4. Blue light can cause melanin deposits in the skin, and it is especially easy to produce pigmentation in the epidermal granular layer and deeper skin layers, which causes the skin to become dark, dull and long.
5. If you often use electronic products before going to bed, strong blue light will disrupt the hormone secretion balance, which will affect sleep quality and indirectly cause dark yellow skin, acne, and hair loss.
The damage of blue light to the skin is subtle, and there is a certain incubation period. Like ultraviolet rays, it is the main cause of skin aging. Blue light has a longer wavelength than ultraviolet light and can penetrate deeper into the skin causing oxidative damage to cells. The energy carried by blue light is much weaker than that of ultraviolet light. The damage to the skin in a short period of time is not obvious, and most small partners can not feel it. His influence is mainly manifested by long-term accumulation.

What can prevent blue light?
In fact, the concept of "anti-blue light" has been suspected by the industry from the beginning as hype, which is mainly based on the lack of understanding of blue light. High-energy blue light within 400 to 440 will not only cause eye fatigue and dryness, and affect vision health. In addition, blue light will invade our skin by exciting free radicals and damaging DNA, making our skin prone to wrinkles and aging. With the development of the times, computers, mobile phones, projectors, LED displays, laser pointers and other "monsters" that produce blue light are basically with us at all times, which leads to our invincibility against blue light. Therefore, anti-blue light should become our skin care routine like anti-ultraviolet.
So how to prevent blue light, what kind of material to prevent blue light?
Earlier, we made it clear: short-wave blue light is a light with a relatively high energy between 400nm and 480nm, especially blue light within 400 to 440 is the most harmful, then we have to find a wavelength in the 400nm-480nm For substances with an absorption effect.