The different types of UV light, can killed Virus?
There are different types of UV rays, and each one affects the body in a different way. A distinction is made between UV-A, UV-B and UV-C radiation.
(100 to 280 nm) barely penetrates our skin and retina, but a large dose can still cause red skin and painful eye inflammation. UVC radiation also destroys cells, which is why it is used in artificial disinfectant. Yet even if UV-C radiation were to cause damage, you don’t need to take any special precautions because the ozone layer absorbs it completely – even in those areas where the ozone layer has been damaged.
UV-A radiation (315 to 400 nm) and UV-B radiation (280 and 315 nm) have a similar effect on the body. They can trigger acute medium- and long-term damage:
Enjoyed in moderation, UV-A and UV-B rays tan the skin, but high doses can cause redness, rashes, allergies or sunburn, for instance on the eyelids. UV-B radiation can cause acute photokeratitis (a.k.a. UV keratitis), a type of damage to the cornea.
UV radiation may lead to conjunctivitis.
UVA radiation can speed up skin aging (or photoaging) and weaken our ability to see. It increases the risk of early-onset age-related macular degeneration (AMD). UVA radiation is also suspected of causing cancer of the eyelid, triggering dangerous changes to the cornea and it can even lead to cataract. 48 percent of all cases of blindness around the world are caused by cataract – and in around 20 percent, UV radiation is responsible for causing or exacerbating the disease. There are also indicators that UVA and UVB radiation could be partially responsible for melanoma. Tissue growth on the conjunctiva and at the edge of the cornea (e.g. Pterygium conjunctivae) and Pinguecula are typical symptoms of excessive UV exposure.