[Q&A] How much do you know about harmful light around you?

2018-05-25 19:54:56
1. Q: What harmful light is there in nature?A: In the natural world, we are exposed to all kinds of light every day. The

1. Q: What harmful light is there in nature?

A: In the natural world, we are exposed to all kinds of light every day. The main ones that are harmful to the eyes are blue light and ultraviolet light.


2. Q: What is Blu-ray?

A: Blue light is the light closest to the ultraviolet light wave and the highest energy. The wavelength is between 400 and 500 nm, and it appears blue in the human eye. Of course, not all blue light is harmful to the eye, of which 415-455 nm blue light is harmful blue light, 465-495 nm blue light is beneficial blue light.


3, Q: What are the hazards of Blu-ray?

A: Blue light harms human body more than other wavelengths. Short-wave blue light has very high energy. It can penetrate the lens directly to the retina and cause damage to the retina. It directly or indirectly causes damage to cells in the macular area. Blu-ray will make it inside the eye. Increased toxin levels in the macular area seriously threaten our fundus health and cause macular degeneration, and may cause red eyes, dry eyes, astringent eyes, blurred vision, visual fatigue, and pain in the head, back, shoulders, and cervical spine. The World Health Organization WHO Eyeful Association announced: As a result of blue light and radiation, more than 30,000 people worldwide become blind each year. According to the data of the Ophthalmology Branch of the Chinese Medical Association, of the 420 million netizens in China, 63.5% of netizens suffer from blue light and radiation. There are vision disorders, cataracts, blindness and other degrees of eye diseases.


4, Q: Where does Blu-ray come from?

A: Blu-ray does not only exist in the sunlight, but also exists in a large number of computer monitors, fluorescent lamps, mobile phones, digital products, LED displays, Yuba, projectors, laser pointers, flashlights and so on. In the multi-screen era, we have a lot of blue light in our work and living environment.


5, Q: What is UV?

A: Ultraviolet light refers to light in the wavelength range of 10 to 400 nanometers (nm) in sunlight. It can be classified as UVA (ultraviolet A, wavelength 320 to 400 nm, long wave), UVB (wavelength 290 to 320 nm, medium wave), and UVC (wavelength). 100 to 290 nm, short wave). UVB has the strongest carcinogenicity, and its sunburn and sunburn effects are 1000 times that of UVA. UVC can be blocked by the ozone layer.


6, Q: What are the hazards of ultraviolet light?

A: UVB has a certain physiological effect on human skin, most of which are absorbed by the skin epidermis, and its higher order energy can produce strong light damage to the skin. The dermal blood vessels in the irradiated area are dilated. The skin may have redness, blisters and other symptoms. Irradiation, inflammation, and skin aging may occur when the skin is irradiated for a long time. Severe cases may cause skin cancer.

UVA penetration of clothing and human skin is stronger than UVB and can reach the depth of the dermis. It can also act on the melanin of the epidermis, which can cause the melanin pigmentation of the skin and make the skin darken. It also acts as a defense against ultraviolet rays and protects the skin. The skin's slow action, long-term accumulation, is one of the causes of skin aging and severe damage.

Ultraviolet light can contribute to degeneration of the lens protein by affecting the redox metabolism of the lens. At the same time, under the influence of ultraviolet rays, phosphorus ions combine with calcium ions to form insoluble calcium phosphate, thereby leading to and accelerating the hardening process of the lens, thereby forming a cataract.


7. Q: How do you protect your eyes from harmful light?


A: Resistant to harmful light, it is crucial to wear suitable glasses. For example, you can choose a new multi-screen blue protective lens from Wanxin Optics. This lens uses UV+420cutTM technology to effectively filter out HEV (short-wave blue light) below 420nm. It also resists UVA, UVB, and comprehensively resists harmful light, providing more effective protection for the eyes.