What's UV and why it's harmful?
What's UV and why it's harmful? UV light is a type of electromagnetic radiation that is not visible to the human eye. It is divided into three types: UVA (315–400 nm), UVB (280–315 nm) and UVC (100–280 nm). UVA and UVB are the most relevant to us humans and our health because UVC is mostly absorbed by the Earth's atmosphere. UVA rays are the longest in wavelength and are present throughout the day, all year, and can penetrate clouds and glass. They can cause damage to the skin and eyes over time, leading to problems such as cataracts and age-related macular degeneration (AMD). AMD is the most common cause of central vision loss in individuals over 60 years of age...