Protection Against Light
The human eye is sensitive to intense light because it damages the retina and can even blind the individual. There are many different types of eye protection against light suited for different applications.
The most common forms of eye protection against light are sunglasses. These primarily protect against UV light from the sun and help increase visibility in bright conditions. They often tend to be fashionable as well as practical. Laser protection eyewear is similar but will filter out a particular (or small range of) wavelength(s), customized to the laser being viewed. Laser protection eyewear is particularly important because of the extremely high intensity of laser light.
Welding glass protects against glare and flying sparks. It is a more extreme implementation of the same idea as sunglasses, suited to the more intense light generated during welding. Shade 14 welding glass (which is much stronger than sunglasses) can also be used to stare directly at the sun (e.g. to view a solar eclipse). Arc welding goggles must be much darker than blowtorch goggles.
Read more about this topic: Eye Protection
Famous quotes containing the words protection against, protection and/or light:
“A strong egoism is a protection against disease, but in the last resort we must begin to love in order that we may not fall ill, and must fall ill if, in consequence of frustration, we cannot love.”
—Sigmund Freud (1856–1939)
“We cannot spare our children the influence of harmful values by turning off the television any more than we can keep them home forever or revamp the world before they get there. Merely keeping them in the dark is no protection and, in fact, can make them vulnerable and immature.”
—Polly Berrien Berends (20th century)
“I’m a scientist also, Dr. Holden. I know the value of the cold light of reason. But I also know the deep shadows that light can cast. The shadows that can blind men to truth.”
—Charles Bennett (b. 1899)