Posts Tagged ‘protection’
Eye surgery is needed to correct certain defects in the eyes, the most common being cataract. It is the removal of a layer of tissue in the eye, and you certainly need to take some precaution after any kind of eye surgery. The most obvious is the protection of your eye from physical impact or abrasion, as you protect your eyes during the healing process. Some people resort to wearing some sort of goggles to protect their eyes during the initial period post surgery.
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Eyeglasses, defined in Wikipedia, are frames bearing lenses worn in front of the eyes. They are formerly used for vision correction; later for eye protection, either from foreign matter or from harmful rays. In fact, they can be a major part of person image and expression as well.
Eyeglasses are thought to be one of the most important invention of mankind history, because without them, scientists may not be able to do precision researches and bring so many discoveries to us; without them, we ordinary people with eyesight problems will never observe the beautiful world around us clearly.
Since eyeglasses are so important to us, what do you know about them?
Eyeglasses emerge earlier than most of us imagine. The first recorded use of corrective lenses may have taken place around 1st Century AD in Rome, while the first pair of wearable eyeglasses was invented around 1284 in Italy by Salvino D’Armate. Since then, eyeglasses began their evolution, from those without legs to with legs; from those with glass lenses to high index plastic lenses; from those plastic frames to titanium frames, etc..
Then with different requirements of eyeglasses of different people, diverse types of eyeglasses are then invented.
Corrective glasses: the original corrective glasses are used to correct refractive errors of the eye–myopia, hyperopia or astigmatism, etc.. This should the most common type for people in their daily lives.
Safety glasses: they are mostly used by athletes or sports lovers, helping them prevent foreign bodies entering eyes; what’s more, for the fact that there is a greater chance for this kind of glasses to get broken and debris may fly into eyes, safety glasses are usually made with shatter-resistant plastic lenses.
Sunglasses: sunglasses provide protection against harmful rays from the sun, so as to reduce or stop the possibility of the emergence of kinds of eye disease. Additionally, nowadays sunglasses can be of both prescription or non-prescription, that is to say, if you are a person with eyesight problems who has to wear corrective glasses, you can also wear prescription sunglasses which both prevent harmful rays and provide a clear vision.
Presbyopia glasses: they include bifocals, trifocals and progressive lenses. The first two lenses are the traditional ones which have only two or three distinct horizontal viewing area, which are easily to make the wearers dizzy for the sharp transition between the focal points. Unlike the two, the last lenses give a smooth transition, providing the wearers a comfortable feeling.
3D glasses: they are specially designed for people to watch 3D movies. Due to the illusion of three dimensions on a two dimensional surface, 3D glasses can offer each eye with different visual information, making the image more real.
Of course there are many other glasses for different usages, for example glasses for watching the solar eclipse.
As for eyeglass styles, they are of a great variety, ranging from rimless glasses to boxy glasses. At present the most in style is those with thick, black and boxy or round frames, in a kind of restoring ancient way. In street, if you keep an eye on the passersby, you will find a lot of them wearing thick boxy or round glasses of different colors, and some of them even just wear glass frames without lenses, just for fashion.
Firmoo.com is the emerging online optical store selling high quality eyewear, such as prescription eyeglasses (single vision myopic glasses, reading glasses, bifocal and progressive eyeglasses etc.,), prescription sunglasses (with RX tinted lenses), prescription sports goggles. Firmoo guarantees lowest possible price in the market. Firmoo’s return and refund policy makes any purchase risk-free ones.
Article Source:http://www.articlesbase.com/vision-articles/what-do-you-know-about-eyeglasses-1668707.html
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Choosing Correct Lenses Online for Kids Prescription Glasses
Among a wide range of prescription glasses available online, coming with affordable and cheap price tags, it becomes difficult to choose the best eyeglass for your child. While selecting the proper eyeglass, the primary concern should be safety. Children are prone to accidents, both at play and at sports activities. Even children with contact lenses require additional protection while participating in sports activities.
The best way to ensure safety for your child’s eye is to purchase prescription glasses with polycarbonate lenses. They are more durable than normal lenses and are very lightweight. As they have the best impact resistance of any lens material, they are practically shatter proof. These features are possible due to the fact that these lenses are made of materials which are very similar to what is called “bulletproof glass”. These prescription glasses also have built-in ultraviolet protection which protects the eyes from the harmful ultraviolet rays of the sun.
The shatter proof nature of the lenses protects a child’s eyes from pieces of flying glasses or plastics when they are hit by a ball or bat. That’s why polycarbonate lenses have become the preferred choice of many doctors when they suggest prescription glasses for children.
A scratch resistant coating is usually present in the lenses, to keep the vision clear as long as possible. Though there is no guarantee of the “scratch proof” property, a front and back “clear, hard coating” does make the lenses more resistant to scratching.
One must also choose a safety frame to hold the polycarbonate lenses. Safety sports frames are designed in such a way that they hold up to high impact from fast-moving balls or heavy racquets. These frames can be purchased online at various sites dealing with both designer and cheap prescription glasses.
Subhadip Sural is content writer specializing in online content for EyeExpert, an online provider of prescription glasses, designer glasses and varifocal glasses. He has been published in newspapers, print and online publications and has more than 3 years of writing and editing experience.
Article Source:http://www.articlesbase.com/vision-articles/choosing-correct-lenses-online-for-kids-prescription-glasses-1648598.html
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WHEN we think of sunglasses, with their respect to eye protection, we think first of UV protection. The Suns’ Ultra Violet Rays have both positive and negative effects on the human condition. As an example of one of the positive effects of the suns’ rays is that they induce the production of Vitamin D in the human skin. This is easier for some people than drinking milk! Obviously, this is only a positive effect when the exposure is limited , with respect to the the sun bathers’ skin pigment, and at the proper time of day. Over, or improper exposure can cause sunburn and other skin maladies.
HOWEVER, it is the UV rays’ effects on the eyes that concerns us. According to Wikipedia, when the eyes are exposed to excessive amounts of UV light, eye structures such as the retina, cornea, and lens can be damaged. WIKIPEDIA further states “Protective eyewear is beneficial to those who might be exposed to UV radiation, particularly short wave UV’s. Mountaineers are exposed to higher than ordinary UV radiation, both because there is a loss of atmospheric filtering, and because of reflection from snow and ice.”
MOST Important to this discussion of eye protection is the following information from Wikipedia. “Ordinary untreated eyeglasses give some protection. Most plastic lenses give more protection than glass lenses, because glass is transparent to UVA, and the common acrylic plastic used for lenses is less so. Some plastic lens materials, such as POLYCARBONATE, inherently block most UV. There are protective treatments available for eye glass lenses that need it, which give better protection. BUT, even a treatment that Completely Blocks UV, Will Not Protect the Eye from Light that Arrives Around the Lens.”
So POLYCARBONATE lenses seem to be a natural solution to eye protection from UV rays. IN particular, the Dry Eye series of polycarbonate,polarized, sunglasses, by Wiley X Co., give even more protection. The Dry Eye Series, also known as Climate Control Sunglasses have a removable inner Facial Cavity Seal(tm). This comfortable, ergonomically designed foam seal fits the Universal Adult Face. The Dry Eye Series of Sunglasses, with Polarized Polycarbonate Lenses give the eyes multiple layers of protection in the following ways:
1-The Facial Cavity Seal blocks out harmful UV Rays from the sides, as well as the top and bottom of the sunglasses.
2- The Facial Cavity Seal blocks out wind which can cause eye strain and dry out the eyes. This Can cause symptoms of Dry Eye Syndrome, particularly in older adults.
3-The Facial Cavity Seal has a patented top down(tm) ventilation system, which keeps the eyes cool and comfortable, while keeping the lenses fog free.
4- The Polarized, Polycarbonate lenses block out, not only 100% of Harmful UV rays, but also contain 99.9% Polarization, which virtually eliminates harmful glare, resulting in clear, sharp, unstrained vision.
5- The Facial Cavity Seal also blocks out airborne debris, such as sand and pollen.
6- Last, But Not Least, the patented(tm), State of The Art, Polycarbonate,Polarized Lens surpasses ANSI Z87.1-2003 High Velocity and Ballistic Safety Standards, and are worn by many of US Military personnel in the most Extreme Hazardous Conditions. They are virtually in a word, (Shatterproof).
When All of the above stated features are combined with various, stylish,wrap around,functional, durable, frames that are virtually indestructible the result is a pair of versatile protective sunglasses with Multiple Layers of Eye Protection.
James zay is the CE?O and head of research at Zioty Marketing Unlimited, Inc., and lives in Florida, where he is an avid surfer, fisherman, and golfer and has recently developed a website for sunglasses with active, outdoor people in mind. www.protectionsunglasses.com
Article Source:http://www.articlesbase.com/vision-articles/multiple-layers-of-eye-protection-1364821.html