Ultra violet rays emitted by the sun are not good for the eyes and thus eyes need to be protected from these rays. Thus, sunglasses provide the protection from these dangerous rays. These rays can also damage vision by clouding eye lens and burning through the delicate film and cells of our retina.
Sunglasses have been devised to protect the eyes from the ultra violet rays. The intense lights can be blocked from reaching to the eyes. It is believed that good sunglasses can block light entering the eyes by as much as 97 percent. Sunglasses can be polarized or non-polarized.
Polarized lenses contain a special filter that helps in reducing the glares and thus improve the comfort and visibility. The light that is reflected back from the flat surface is horizontally polarized and the lens of glares are vertically polarized and thus they are able to block the glare. Spectacles have been evolved from reading glasses, and these reading glasses are supposed to be appeared in Italy for the first time in the year These reading glasses were designed to help the elders in reading as due to age their vision had got blurred.
This was a boon for mankind and thus got popularized very soon. Today spectacles and reading glasses are often used interchangeably, however eyeglasses used to denote the eyewear with no side bars whereas spectacles referred to frames with sidebars.
The lens of spectacles are made from a solid material like glass or plastic. Meet the Author with Robert J. De Boer. Safety Talks 18 - Heat Stress Preparedness. The Dangers of Gas in a Confined Space. Preventing Burst Pipes in Aging Buildings. Here's Why It Should Be. Hiring Contractors? Addressing Mental Illness and Workplace Safety. Risk Takers Wanted. Follow Connect with us. Sign up. Thank you for subscribing to our newsletter! Connect with us. By Henry Skjerven Last updated: April 6, These sunglasses are also used to enhance the style, apart from being used as an eye protection gadget.
Ultra violet rays emitted by the sun are not good for the eyes and thus eyes need to be protected from these rays. Thus, sunglasses provide the protection from these dangerous rays. These rays can also damage vision by clouding eye lens and burning through the delicate film and cells of our retina. Sunglasses have been devised to protect the eyes from the ultra violet rays. The intense lights can be blocked from reaching to the eyes.
It is believed that good sunglasses can block light entering the eyes by as much as 97 percent. Sunglasses can be polarized or non-polarized. Polarized lenses contain a special filter that helps in reducing the glares and thus improve the comfort and visibility. The light that is reflected back from the flat surface is horizontally polarized and the lens of glares are vertically polarized and thus they are able to block the glare.
Sometimes sunglasses are also considered as goggles, as they also shield the eyes from the sunlight, but formally the goggles represent tight fitting safety glasses that are used to protect the eyes from various potential blinding sources. Goggles are used in chemical laboratories where the chemicals can be dangerous to eyes and thus, it is necessary to guard the eyes. Goggles are also used in sports like swimming, where the tight proof design of goggles prevents the water to enter the eyes.
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