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HOW DO BLUE LIGHT BLOCKING GLASSES WORK?
BLUE LIGHT BLOCKING GLASSES FUNCTIONS IN TWO WAYS
1) FIRST, THEY FILTER BLUE LIGHT THROUGH THE FILM LAYER,
The lens is basically transparent, and the film layer is mostly blue,
so the background color of the lens presents a pale yellow visual effect.
2) SECOND, THOSE GLASSES LENSES ARE MADE BY ADDING SPECIAL MATERIALS TO THE LENSES DURING THE PRODUCTION PROCESS, AND THE LENS ITSELF WILL SHOW A YELLOWISH VISUAL EFFECT.
Those lenses have the function to filter blue light.
The difference lies in the degree of anti-Blu-ray, the effect of dyeing anti-blue light is higher, but the aesthetics will be affected, and the light transmittance will decrease on the visual effect;
the anti-blue light and anti-blue light effect of the film layer is relatively lower, but the light transmittance is not affected and suitable for everyday wear.
What is blue light?
Blue light is a short-wave high-energy light having a wavelength between 400 nm and 480 nm.
The blue light in this wavelength will increase the amount of toxin in the macular area of the eye, which seriously threatens the health of our fundus.
Blu-ray-induced blind eye disease, the current effective solution is to film screens or lenses.
The anti-blue film technology is very mature and low in cost, which can effectively prevent blue light from penetrating.
Not all blue lights are harmful, what is really harmful is blue light having a wavelength within 400 to 440.
Actually, blue light between 480 and 500 nanometers has a function of adjusting biological rhythm, sleep, mood, memory, etc.
However, short-wave blue light will definitely cause harm to the human eye, which is related to the irradiation intensity and the irradiation time.
When the illumination reaches a certain level, it lasts for more than two hours, and it is possible to damage the retina.
WHAT IS MAJOR HAZARD AND RISK OF BLUE LIGHT？
The harm of blue light to the human eye is mainly caused by eye pathological damage and human rhythm damage leading to myopia, cataract and macular degeneration.
1) HARMFUL BLUE LIGHT HAS EXTREMELY HIGH ENERGY, CAN PENETRATE THE LENS TO REACH THE RETINA, CAUSING ATROPHY OR EVEN DEATH OF RETINAL PIGMENT EPITHELIAL CELLS.
The death of light-sensitive cells will result in decreased or even complete loss of vision, which is irreversible. Blue light can also cause macular degeneration.
The crystals in the human eye absorb some of the blue light and gradually become turbid to form a cataract. Most of the blue light will penetrate the crystals.
Especially the children's crystals are clear and cannot effectively resist blue light, which is more likely to cause macular degeneration and cataract. Computer glasses blue light
2) BLUE LIGHT DAMAGE SECOND VISUAL FATIGUE:
due to the short wavelength of blue light, the focus point does not fall in the center of the retina, but a position closer to the front of the retina.
To see clearly, the eyeball will be in a state of tension for a long time, causing visual fatigue. Long-term visual fatigue may lead to deeper myopia, double vision, easy serialization during reading, and inability to concentrate, which affects people's learning and work efficiency.
3) BLUE LIGHT HARMS THE THIRD SLEEP WELL:
Blue light will inhibit the secretion of melatonin, and melatonin is an important hormone affecting sleep, the current known role is to promote sleep, adjust the time difference. This also explains why playing a mobile phone or tablet before going to bed can cause poor sleep quality or even difficulty falling asleep.
4) CAUSING GLARE
Since short-wavelength light has a relatively high energy, the incidence of fine particles in the air is high, which is the main cause of glare.
Patients with retinopathy and post-operative surgery (excimer surgery, cataract surgery) are very sensitive to light and can feel abnormal glare, which is also caused by short-wave blue light.
5) VISUAL FATIGUE
6) THE BLURRING OF VISION.
When the visible light is focused in the eye, the focus is different, and a focal distance difference is formed between the two focal points. This is the main reason for the blurring of vision.
Long-term visual fatigue can cause other symptoms of fatigue. The injection of blue light exacerbates the focus distance difference and visual blur. Because the blue light is focused, the focus does not fall on the retina, but falls between the retina and the lens. Increases the focus distance difference in which the light is focused in the eye.
7) BLU-RAY IS THE MAIN CAUSE OF DIGITAL VISUAL FATIGUE (DEF).
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