The UV filter’s
function is to protect the cornea
and eye tissues beneath it from
negative effects of ultraviolet radiation.
What exactly is UV?
(ultraviolet rays) are part of the light produced by the
sun. For humans, this light is visually unnoticeable, due to its shorter
wavelength. Ultraviolet rays were discovered in the early 19th century by a
German physicist and divided into several groups according to their wavelength.
UV-A and UV-B rays are especially dangerous for humans.
UV-A rays comprise 99% of solar radiation, and their effects cause changes in
the structure of enzymes. UV-B rays decompose proteins
thereby negatively affecting the metabolism of cells and disrupting DNA
structure, causing the cancerous growth. Humans are partially protected from
UV-B rays by the ozone layer.