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1.Anti-blue glasses glasses can prevent blue light that irritates the eyes. The special anti-blue glasses can effectively isolate ultraviolet rays and radiation, can filter blue light, and are suitable for use when watching computers or TV phones.

2.Blue light is part of natural visible light, and both sunlight and electronic screens emit blue light. Blue light is an important part of visible light. Nature itself does not have a single white light. Blue light is mixed with green light and red light to display white light. Green light and red light have low energy and are less irritating to the eyes. Blue light has a short wavelength and high energy, which can directly penetrate the lens to reach the macular area of the eye, leading to macular disease.

3.As early as 1966, Nell et al. found that blue light irradiation can cause damage to retinal cells, resulting in decreased vision or even loss of vision. Among them, short-wave blue light with a wavelength between 400-450 nanometers is the most harmful to the retina.

In the 2010 International Optical Association Annual Meeting, 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 produce free radicals, and these free radicals can cause the death of retinal pigment epithelial cells. The death of epithelial cells can lead to the lack of nutrients in light-sensitive cells and cause vision damage, and these damages are irreversible.

German ophthalmologist R.H.W. Funk (R.H.W. Funk) research report pointed out that when "unsuitable light" continues to shine on our eyes, it will also cause physical dysfunction.

Anti-blue glasses can effectively reduce the continuous damage of blue light to the eyes. Through the comparative test of the portable spectrum analyzer, after using the anti-blue glasses, the intensity of blue light emitted by the mobile phone screen is effectively suppressed, reducing the harmful blue light to the eyes.

Anti-blue glasses mainly reflect harmful blue light by coating on the surface of the lens, or add anti-blue light factors through the lens substrate to absorb harmful blue light, thereby realizing the blocking of harmful blue light and protecting the eyes.

Any anti-blue lens that uses film reflection technology, because it reflects harmful blue light, the surface of the lens will reflect blue light, and the anti-blue lens with substrate absorption technology will not reflect blue light. As shown in Figure 4, the blue light-reflecting glasses are anti-blue light glasses.

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