Polarized sunglasses are sunglasses that help diminish the glare of the sun. Polarized sunglasses provide incredibly clear, glare-free vision. These glasses were first worn by pilots to help them see when the sun was shining in different spots during the day. These days, many people wear polarized sunglasses when driving, golfing, and fishing. They look the same of other types of sunglasses, but deflect the sunlight in such a way so that it is not distracting when they are focusing on other things.

For those who drive a lot during the day, these sunglasses will help keep the sun from becoming too distracting. People seem to get less tired and have fewer headaches on long trips. Polarized sunglasses can make driving a boat or a car safer and improve outdoor performances.

When fishing, wearing polarized sunglasses will allow people to see into the water more clearly. When the sun is out, it can reflect off the water and cause the visibility to go down. When fishing, many people need to see into the water. Polarized sunglasses take a lot of the glare off the water allowing people to see what is below. This is helpful when boating also. In order to protect the boat from jagged rocks just below the surface, people can navigate the boat around these objects because they saw them ahead of time. These sunglasses can cave people from a wide variety of accidents both in the water and on the road.

Polarized sunglasses are not too expensive and come in a wide variety of styles and colors. They can be found wherever sunglasses are sold. At first, many of these sunglasses came with yellow tinted lenses, but these days the lenses are clear which many people are happy about. For those who enjoy outdoor activities like hiking, hunting, and sports, a pair of these sunglasses will help them get the most out of their day. Buying a pair of these sunglasses will help a person enjoy being out in the sun and not having to worry about missing out on any part of it.

Polarized sunglasses are so lightweight, you’ll almost forget you’re wearing them.They also provide excellent coverage and protection from wind, glare, and dust.

The hottest ideas and the latest information. Do yourself a favor and Click: Bifocal Sunglasses

In Roman times, Emperor Nero liked to watch gladiator fights through emeralds, to avoid the sun getting in his eyes. It is likely that humans in other time periods prior to the invention of sunglasses may also have put various materials over their face to protect their eyes from the brightness of the sun, but little evidence exists for this until we reach the 12th century.

The 12th century is when sunglasses were invented properly, in China. They were using lenses made from imperfection-heavy quartz to block out the light from the sun, and primitive frames to hold them against the wearer’s face. These sunglasses didn’t protect against harmful UV rays or help their wearer to see any better (in fact, they made it very difficult to see), but they provided some relief from having the bright sun constantly shining into their eyes. Only the rich had them, but they found many uses for them – Chinese rulers and judges, for example, found that they could use the sunglasses to hide the expression on their face when they were talking to someone, allowing them to seem emotionally detached from situations.

It was not until the 20th century that sunglasses really took off, though, as Hollywood stars started wearing them to protect their eyes from the bright studio lights. By 1929, an entrepreneur named Sam Foster had put sunglasses into mass production in America, and was doing a roaring trade through his company, Foster Grant of Atlantic City. In 1936, Polaroid filters were invented, allowing glasses to protect against UV rays for the first time, and making them a desirable item for health reasons as well as for reasons of fashion and comfort – useful in World War II, when soldiers had to fight in the French summer. Since then, there have been few developments in sunglasses, with the basic science and materials remaining basically the same for the last seventy years – but, like other useful inventions of the period, they remain a big seller.

John Gibb is the owner of sunglasses guidance , For more information on sunglasses please check out http://www.Sunglasses-guidance.info

There are two reasons to wear sunglasses. The first reason is if you don’t like the bright sun shining in your eyes, as the dark surface of the sunglasses helps to block out bright light and make the world appear darker. The second is that the sun’s ultraviolet rays can be harmful in the long term, causing all sorts of problems with your eyes including loss of eyesight and eye cancer. Good sunglasses protect against this, as their lenses filter out most of the harmful UV rays.

So how do sunglasses work? The darkening effect is a very simple one: looking at the world through tinted lenses makes it seem darker to you – even though the effect is really just an optical illusion, it can help you if exposure to bright sunlight tends to give you a headache or cause you to squint.

The UV-filtering effect, however, is more complex. UV-filtering lenses are coated with special chemicals that allow light to pass through them, but reflect away UV. UV rays are basically high-frequency light waves, which means that the chemical structure has to be built to deflect higher frequency light while allowing through lower frequency light. This is difficult science, and the materials needed to do it are expensive.

The most complicated sunglasses of all are prescription sunglasses. These are sunglasses that not only protect from light and UV, but also work like normal glasses to correct your eyesight. For this to work, it requires that normal vision-correction glasses are taken, tinted and coated with UV-reflecting chemicals – a complicated three-step process. However, all the ingredients work together flawlessly, to produce sunglasses that are wearable by people who need their vision corrected all the time. It is even possible to buy clear tinted lenses that fit over the top of your normal glasses, effectively a do-it-yourself way of making prescription sunglasses.

John Gibb is the owner of sunglasses guidance , For more information on sunglasses please check out http://www.Sunglasses-guidance.info

Recent statistics reveal that one out of ten women between the ages of 40 and 65 wears reading glasses. If you already wear glasses or contact lenses, then bifocals might be in your future. If you are like most women, this is not an event to look forward to.

In what is considered the ‘normal aging processes’, the lens of your eye begins to stiffen as the years go by. As the lens becomes less flexible, it becomes more difficult to focus on something close. This is a form of farsightedness called presbyopia. This condition is generally corrected with reading glasses or bifocal lenses.

There are also several age related eye diseases that can occur over 40. Most serious eye diseases are painless, and show no symptoms for years. Only a qualified professional can detect and diagnose them before they cause permanent damage.

Glaucoma is one of the most common eye diseases. Glaucoma causes almost 12% of all blindness in the US. Increased fluid builds up within the eyeball, causing pressure. This pressure, over time causes irreversible damage and blindness.

Cataracts are caused by a build up of protein on the lens of the eye. Over time, the lens turns milky white, and clouds vision. The lenses then need to be surgically replaced to restore vision.

Macular Degeneration results in the loss of sharp vision. The macula is the part of your eye that is responsible for sharp focus, and bringing things clearly into view. The cause of this condition is still unknown, and it generally affects people over 60.

Like all other parts of your body, your eyes respond favorably to great nutrition and exercise. Optimum nutrition for your eyes includes proper amounts of Vitamin A, C, and E, as well as the minerals selenium and zinc. These nutrients are found in fresh fruits and vegetables, especially in yellow and yellow-orange foods like yams, cantaloupes, and carrots.

A growing number of vision therapists believe that a series of eye exercises done daily can help keep your eyes younger. Common sense tells us that exercise is important for all the muscles in the body, and the eye muscles are no different.

There are several hundred various exercises for your eyes, and no single exercise can offer the solution to every vision problem.

One you can try if you work at a computer all day is to tack a piece of newsprint to the wall, about 8 feet away from your computer terminal. Interrupt your work every 15 to 20 minutes, and focus on the newspaper, then back to your computer screen. Do this several times daily. This exercise can help prevent the blurry vision that some people experience at the end of their workday.

Deteriorating vision does not have to go along with the aging process. If owning a pair of reading glasses, or bifocals is the last thing you want to do, then it’s time to focus on prevention.

Gerri Stone publishes a newsletter with free tips and exercises to keep your vision young at http://www.naturalvisionsolution.com

Want to look cool out on the baseball field, or even when you’re just watching it live from the bleachers? Well, you sure won’t cut it by buying those huge styrofoam hats that proclaim your love for your team! There’s a more stylish and subtle way to catch attention, and this is by attending the game in the right gear - or, by wearing the right pair of baseball sunglasses.

Baseball sunglasses have to be up to par. They aren’t like regular sunglasses that pay more attention to fashion rather than function. For one thing, they are sports sunglasses, which means they need to be imbued with extra protective features…things like wind and dust protection. Function is all-important! These are sunglasses you wear in direct sunlight; therefore you’ll definitely need top-rate UV protection. Choose sunglasses that promise at least 90% UV protection, for maximum care for your eyes. Baseball enthusiasts quite possibly need the full use of their healthy eyes more than any other part of their body.

And since it’s assumed that you’ll be wearing them out in the sun for long hours in one go, you can safely assume you’ll also be sweating quite a bit while wearing them. This is why you should choose sunglasses that have anti-corrosive properties. Different skin types and body chemistries produce different types of sweat, which comes with different acidity levels, so you need to make sure your sports eyewear won’t actually "melt" while you’re wearing them. No, the color or the frame itself won’t bleed down the sides of your face, but if you’re after the perfect sporty look, corroded frames could be such a turnoff. They could even be risky, because corroded frames could break at any moment.

In other words, never invest in cheap sunglasses for your sports ensemble. You aren’t paying for just the "look," but also the durability that you need from everything you wear outdoors. Special tints that not only block out the sun, but adjust to all sorts of weather conditions, would be especially useful to you. Cheap sunglasses only offer a minimum of protection from the elements, so don’t settle for anything less than the best outdoor eyewear.

The "look" is important, of course. People wear sunglasses off the field to look cool while keeping their eyes protected, and even with the extra functionality offered by sports eyewear, there’s no reason why your baseball sunglasses can’t also be stylish.

Sunglassology.com provides you with information on all kinds of baseball sunglasses. Where to buy them and what to look out for.

Searching for the perfect look for any season? Sun glasses make the perfect accessory to most ensembles. Any outfit gets an extra touch of style when you pay attention to decorating the parts of your body from the neck up. Why deny yourself the opportunity to look extra hot in the cold season, and extra cool during the heat wave?

It must be the mysterious look. Sun glasses provide the "it" factor that many of us seek from our accessories, and this is why the trendier of us invest in genuine upscale brands like Ray-Ban and Oakley - you pay for the long-term "it" thing that goes well with anything you wear. In fact, sunglasses even look cool at night! But to keep from suffering the embarrassment of bumping into telephone poles and the like, there are also glasses that offer flexible visual opacity; in short, not all sunglasses obscure sight even in places that have no sun.

For practical purposes, you should choose sunglasses that block out at least 90% of the sun’s UV rays. This would ensure that your pretty eyes are kept safe, which is the primary purpose of sunglasses.

Next, you should choose a make and design that fits your activities and your lifestyle. If you’re an active, sporty person you’ll want the extra wind and dust protection afforded by wraparound shades, many of which are nowadays designed to look cool with sports wear! You’ll also need sunglasses that are anti-corrosive, meaning the acidity of your skin won’t harm the material the frames are made of. This is important because when you engage in sporty activities, you sweat a lot, and sweat comes with acid that may damage the frame of your sunglasses. Some people’s skin is more acidic than others’, but good sports sunglasses will take different skin and sweat types into consideration.

Should you need sunglasses mainly to look chic, you don’t need to worry so much about wind and dust protection. Fashion sunglasses that focus more on the look than on the make have been manufactured since Hollywood stars of the 50s made them famous in their films. Choosing the right shape and color of the frame would help you pick out sunglasses that are just as trendy as fashion jewelry. Buy more than one pair so you can mix and match your sun glasses with your wardrobe!

Sun glasses have always lent a little extra "cool" to any ensemble. If you’re looking to stand out in a crowd, invest in shades!

Sunglassology.com provides you with information on all kinds of Sun glasses. Where to buy them and what to look out for.

What, you think only humans are entitled to look cool and accessorize? Think again! Man’s best friend deserves the very best, and this applies to accessories as well. For the things you love, you just don’t hold back when it comes to protective gear. Did you know that even dogs can wear protective eyewear? That’s right! Dog sunglasses help block out the sun’s rays and protect your puppy’s sensitive eyes from other harmful elements.

If you’re still shopping for the best toys and accessories for your outdoorsy dog, don’t forget to look into dog sunglasses. Sure, the idea of making your sporty dog wear anything on his or her face may take some getting used to - for both you and your pet - but the rewards are worth it.

Yes, active dogs do have a tendency to wear out everything they own or have to wear, including but not limited to leashes, collars and harnesses - but eyewear may be an accessory that they’ll end up appreciating for a long time. Your pet may worry or try to remove his or her first pair of sunglasses, so for his first pair of sunglasses, choose eyewear that won’t easily fall off or break. This would teach him or her to get accustomed to the new facial decoration.

Actually, it isn’t just a decoration - outdoorsy dogs need as much eye protection as they can get. Say, for example, that you often take your dog riding on your top-down car or your sidecar… your dog will definitely be exposed to more wind and dust than regular domestic pets, so when you’re shopping for protective eyewear, make sure you get sunglasses that have sturdy lenses that can take the sort of facial whipping that even you, as the human owner, get when on the road. Make sure your glasses are wraparound too, so they don’t leave spaces for the wind or particles of debris to enter your dog’s eyes.

Anti-fog and anti-corrosive frames would definitely be a plus for the sporty pet. Moreover, make sure the tinted lenses adjust to different light sources, as you may need to go indoors and outdoors with your puppy quite often. It’s not enough that the lenses block out the light - the important thing is actually that they block out UV rays, and not light, so that your dog can still walk with them even when indoors.

Dog sunglasses isn’t an easy idea to adjust to, but if you’re living in a sunny place and you frequently find yourself taking your dog out with you on trips, it is something you should seriously consider.

Sunglassology.com provides you with information on all kinds of dog sunglasses. Where to buy them and what to look out for.

For Julie, my best friend, world meant black without her spectacles. The poor myopic girl became the butt of social ridicules because of these thick glasses of hers. At twenty five she used to look like forty years old because of her glasses. Yes, she tried contact lenses once, but she wasn’t comfortable with them and the glasses were the only bridge between her and the world, until the summer of 2000, when she underwent laser eye surgery. Since then everything has changed for her. In her own words surgery brought her freedom; freedom to see the world with her own eyes without any kind of dependence.

Julie is not alone in her experience. There are thousands all across the USA, who are taking to Laser Eye Surgery, the most exciting advancement in ophthalmology. The traditional corrective measures for problematic eye sight involve using spectacles or contact lenses. But in recent years laser surgery seems to replace these traditional devices of correcting eye sight problem.

But what is laser eye surgery?

Laser eye surgery is a surgical procedure intended to correct common vision disorders, referred to as refractive disorders in ophthalmology which include myopia or nearsightedness, hyperopia or farsightedness and also astigmatism or distorted vision.

In this surgery, the laser is aimed at the cornea, which is the outer and clear round structure covering the iris, the colored part of the eye and the pupil. The surgery intends to gently reshape the cornea by changing the thickness of the tissues of cornea. No matter whether you are far sighted or near sighted, the surgery will help your eyes bring the images into proper focus.

Can you opt for different types of laser surgery?

Yes of course you can. Currently there are mainly three types of laser eye surgeries, which you can choose from depending on the type of your eye problem and your budget.

So far LASIK is the most popular type of eye laser surgery that uses the most advanced technological equipment. This is a procedure, which involves carving out of a thin layer of cornea to create a flap. The objective of this procedure is to direct the laser to the tissues lying underneath. The flap which is replaced grows back naturally. And you get an improved vision almost instantly.

The next option is EPIFLAP or LASEK surgery. In this process, the outer layer of cells on the eye is partially removed to expose the cornea. Then laser is applied to flatten or reshape the cornea and the outer cells are pushed back. Just a matter of few days and you get impeccable vision.

The last and oldest option is PRK, which is performed on an outpatient basis with local anaesthesia. In this refractive surgery, laser is applied to remove microscopic amounts of tissue from the outer surface to reshape cornea.

Is it safe?

The laser eye surgery is a surgical procedure, approved by The US Food and Drug Administration. So you can understand there can be no question regarding its safety. But of course there are certain differences of opinion relating to its result, because the procedure is relatively new and long term effects of this surgery are still unknown.

If you are still doubtful, let me share with you a piece of information: according to a certain estimate, more than one million Americans every year undergo laser eye surgery to get rid of their glasses and contact lenses and the number is still increasing. A more valid proof of its growing popularity is the diminishing cost of the procedure.

Lucy Bartlett is a proud contributing author. Find more articles here. For more info visit Laser Eye Surgery or Lasik

You probably already know that sunglasses protect your eyes from the sun’s damaging rays, but not all glasses are created equal. So, what should you look for in a great pair of sunglasses? Can you still look fashionable while properly protecting your eyes? What does UVR mean? Should you buy wrap arounds? And what does polarization mean?

UVR and Sun Protection

If you’re going to look good while wearing sunglasses (and really, would you wear a pair that make you look horrible?), it should protect your eyes to the max at the same time. UVR means ultra-violet rays, and if you’ve ever watched any sort of weather report, you’ll have probably seen the term UV index.

The light you see from the sun is composed of an entire range of rays. The visible rays you see is just a small component. UV rays are invisible – that is, they are at a spectrum beyond the range your eyes can see. The sun’s spectrum has a range from weak to strong radiation, with infra-red weak, visible light normal, and UV rays strong and damaging. Anything above visible light can cause premature wrinkling, skin cancer and, in the eyes, cataracts, retinal damage, and eyelid cancer. There are rays even stronger than UV, but the earth’s atmosphere completely blocks them – nothing on earth would survive if they got through.

With that in mind, do sunglasses block UV rays? You bet! However, some do not completely block them, and it might not be related to price. Tests have found that a $1 pair of sunglasses could block out 100% of the sun’s UV rays, while a $300 only blocks 95%. Fortunately, there is an industry standard, called ANSI, and sunglasses at least 99% effective will be labeled “Meets ANSI UV Requirements.” Another measurement you might see is “protection up to 400 nm”, which is the measure of the sun’s wavelength in nanometers. Ultraviolet rays are between 380 – 200 nm. The smaller the number, the more hot and dangerous the rays are. (Now you know why that little appliance in your kitchen is called a “microwave”!) If you’re unsure about the protection of your new pair of sunglasses, simply go to most optical stores, where an employee can use a photometer to test their blocking properties.

Wrap-arounds offer the best UV protection, for they block the rays from entering the sides of your eyes. They have a very curved lens, and you will often see them as one solid piece curving from one side of your head to the other. It’s a very slick, sporty look. However, because of their special construction, you won’t be able to get them in a custom prescription.

Does the Color of the Lens Determine Sun Protection?

No. They are purely cosmetic. UV-block on the lens is mainly an invisible coating. However, they do distort visible light, and when used on high-end, specialty sports sunglasses, this color distortion allows greater clarity while participating in extreme sports. Below is a quick list of how the color affects you:

• Gray: no color distortion, great for everyday use
• Brown: High contrast and depth perception, slightly distorts color
• Yellow: High contrast, but creates harsh visible light
• Green: little color distortion, some color contrast, excellent for everyday and sports use
• Blue: Best for skiing as it filters the white, but also causes large color distortion
• Pink: Great for viewing computer screens, but causes large color distortion
• Vermillion (purplish-red): Best for water sports, but huge color distortion

What’s This Polarization I Keep Hearing About?

These sunglasses block the glare. They have been used by pilots and fishermen for years, and were specifically developed for American pilots in World War II. On a sunny day, sunlight hits a flat surface like snow, water or pavement, and bounces back up into your eyes. Because the light is so concentrated, it can be quite painful over long periods, and is the cause of “snow blindness.” Lens treated with polarizers block this light, reducing or completely eliminating this glare.

If you’re spending a long time on the bike trails, driving, playing watersports, inline skating or simply jogging, polarized sunglasses will greatly help. Be aware, though, that LCD displays use a similar light technique, and so they will be invisible in polarized lens if seen at a certain angle.

In the last few years, different types of polarizers have been developed for certain sports, after research on how the light bounces off different surfaces. Thus, you’ll now see sunglasses specifically for skiing, biking, golfing, driving and boating.

Now You Have the Knowledge!

With your newfound knowledge, it’s time to find those perfect pair of sunglasses. Using them for simple everyday fashion or for a specific use like driving or golfing? You now know what to browse for. Look cool, and protect your eyes at the same time!

Chris is the author of 1st-in-Cool-Eyewear.com, a great resource for all things sunglasses. Learn tips about designer glasses and the best type of sports sunglasses to protect yourself outdoors.

Oakley has been the most successful sunglasses company in the last 30 years, creating technological breakthroughs, spawning hundreds of imitators and basically re-inventing the concept of sunglasses. So who’s behind this global phenomenon, and how is Oakley staying on and over the top?

In 1975, a motorcycle parts salesman named Jim Jannard languished at his dead-end job in California. Along the way, he developed a space-age material he called “Unobtanium”. This material, synthetic and soft, is slightly sticky and grips to the skin well, and even better when wet. He sold it for motorcycle grips, and it is still used today as ear socks on glasses. He touted the handgrip to his bosses, who weren’t interested and told him to continue selling the regular, familiar grips to riders. Frustrated, he quit his job, and with $300 he started Oakley, named after his pet English Setter.

He took a grassroots approach, marketing his grips to local riders at motorcross events. The material was an immediate hit, and in the late 70’s, with the BMX scene taking off, he modified the design for them as well.

Oakley was a major success, but it wasn’t enough for Jannard. The problem he saw was that the grips were covered by the rider’s hands. So, while everybody knew the name “Oakley”, nobody knew what they were. With massive design ideas in his head, he created a pair of motorcross goggles with his logo prominently displayed. They, too, were a huge hit, but by then the young genius was thinking of sports sunglasses, a market which until then did not exist.

The Birth of a New Kind of Eyewear

At the time, sunglasses were your familiar two lens aviator shades. Jannard developed a goggles-like one lens wrap-around frame that curved around the head. They were called the Eyeshade, and not only were they revolutionary in design and technology, nobody in the world had ever seen anything so strange looking and futuristic. In retrospect they fit right in, along with the mullets, big shoulder pads and hair bands of the 80’s!

Orders began trickling in, contrary to what most critics thought of as a weird but dead-end fashion statement. This is because nobody but fans knew what Oakley was actually doing. Through exhaustive research and testing to blend high technology with performance, pro sports stars quickly began to realize how much these sunglasses helped in their game. Lance Armstrong, Michael Jordan and David Duval realized in the 1990’s the advantage of wearing Oakleys to dramatically increase their performance. Oakley’s only limitation is being so far ahead of the game that many people do not understand the massive technological effort behind every pair of shades. But this is changing as more and more sports stars are adopting them, from golfers to cyclists to surfers to mountain climbers.

Extreme Technology

Oakley has not only used technology to build their products – they have redefined what sunglasses are. Where sunglasses were once seen exclusively as a cool fashion accessory (though sports glasses did exist with Ray Ban’s polarization filters since the 1930’s), Oakley has made sports eyewear into a technological marvel. Lightweight, durable and impact resistant, the lens, coatings and frames are all designed with advanced materials, blocking all UV light while creating extensive visual clarity and the contrast needed for athletes. Each pair of Oakley’s today can have over a hundred patents built into the frames and lens.

Looking Into the Future

Due to the extreme competition of the sunglass market, Oakley’s designers invent new techniques and materials in ultra-secret bunkers. The last few years has introduced not only more advanced sports eyewear, but wearable technology such as MP3 players and cellphone technology. Branching out into shoes, watches and sports clothing with the same technological philosophy, the future is bright for Oakley. What will come onto the market next will be as exciting and astonishing as what they’ve been inventing for the last few decades!

Chris is the author of 1st-in-Cool-Eyewear.com, a great resource for all things sunglasses. Learn tips about designer glasses and the best type of sports sunglasses to protect yourself outdoors.