What is UV or ultraviolet radiation?
UV or Ultraviolet radiation is comprised mostly from the invisible light spectrum that falls between 100 and 400 manometers (nm). UV is divided into three segments. These segments are designated as A, B, and C. The last segment, UV-C (below 280 nm), is not considered a threat since it is filtered by the earth’s ozone layer and as such never reaches earth. Exposure to both UV-A and UV-B does pose a risk to both the short term and long term health of your eyes. Where does UV come from? The primary source of UV is from the sun. However, there are other sources (artificial) such as, sun lamps typically found in tanning parlors, the flash from welding machines, high-intensity mercury vapor lamps found in sports stadiums, lasers and xenon arc lamps to name a few.
