Most polymers consist of covalently bonded organic constituents, and are susceptible to damage by UV rays. Chain scission by photolysis is the most common mechanism of UV damage, which causes the break-up of long chains into shorter ones. As the chains become shorter, they lose their physical and aesthetic properties. Additionally, they may release byproducts into the environment. This degradation can cause several problems. Here are the effects of UV rays.
Eyes: Children are particularly susceptible to UV damage because they spend more time outdoors than adults. During their formative years, half of their lifetime’s UV exposure occurs. The reason is simple – children’s lenses are clearer than those of adults, 紫外線 ダメージの記事はこちら allowing more UV to reach the eye. It is important to protect your eyes during the summer months and avoid prolonged exposure to direct sunlight. By wearing UV-blocking sunglasses, you can reduce the risk of eye diseases associated with UV exposure.
Eyes: While eyelid skin is thinnest of the body, UV exposure can cause dryness, wrinkles, accentuated skin furrows, sagging, and eyelid cancer. Exposure to UV light is also associated with skin cancers. It is known to increase the risk of developing skin cancer and cutaneous melanoma. Similarly, squamous cell carcinoma, which develops on the conjunctiva and can invade the cornea and the inside of the eye, can be caused by UV exposure.
UV-B radiation has been associated with non-melanoma skin cancer, including squamous and basal cell carcinoma. Studies have linked UV-B radiation to the increase of NMSCs in the stratospheric ozone layer. In the case of skin cancers, the damage caused by UVB radiation is mediated through oxidative and dimerizing mutations. Hence, this exposure is linked to the development of a wide range of cancers.
The sun’s ultraviolet rays cause fading and cracking of many natural and synthetic materials. Plastics, for example, become brittle and crack when exposed to sunlight for long periods of time. Likewise, fabric undergoes a phototendering process that reduces strength and flexibility. The result is a dull, lifeless look for your material. If you’re thinking of purchasing new clothes or accessories, make sure to protect them from UV damage.
There are many ways to mitigate the effects of UV rays. One way is to add UV-absorbing compounds to the polymer. These substances help the polymer resist the oxidation process, but they can alter the material’s properties. Furthermore, some additives are harmful to human health. Shades and impenetrable barriers can also help prevent UV degradation. The use of a UV absorber is recommended if you plan on using your polymer in a lot of direct sunlight.
The other way that UV rays can damage your skin is by causing melanin to build up on the outer layer of skin. Melanin is the outer layer of skin that filters UV radiation physiologically, and shields the deeper skin cells from UV damage. People with dark skin rarely suffer the harmful effects of UV exposure. However, UVB exposure stimulates pigment cells to produce extra melanin, which tans pale skin. However, those with red hair are particularly vulnerable to UV damage.
Although UV-rays can penetrate glass, the damage can be minimized if you wear a wide-brimmed hat. Also, wear sunglasses, preferably with UV-rated lenses, especially if you’re in the sun for long periods of time. Wearing sunglasses everyday is essential for all of us, and children need to wear UV-protective lenses as well. For the best protection, opt for grey lenses, which provide the closest color perception.
UV-rays can also cause skin cancer. Some types of skin cancer are more severe than others, including melanoma. It has been found that a lifetime of sun exposure increases the risk of developing skin cancer. Fortunately, Australia is blessed with clean skies and less air pollution. In contrast to other countries, Australia enjoys clear skies and few hazard from the sun. If you have outdoor jobs or spend lots of time outdoors, protect yourself with UV protection throughout the year.
Chronic exposure to the sun’s UV rays is the most common cause of premature aging. It causes skin to become thick, leathery, and wrinkled. While the effects of UV exposure are often slow and gradual, they manifest themselves years after prolonged exposure to the sun. It is common for people to dismiss these problems as simply part of growing older. But research has shown that ninety percent of the visible changes in skin are caused by exposure to the sun. Proper protection will prevent premature aging and other harmful effects of UV exposure.
