Somewhere around 1200-1300A.D. a well known philosopher and scientist by the name of Roger Bacon made his mark in history when he recorded the first known use of lenses. While teaching at Oxford he worked hard on research and experiments. Later Pope Clement IV convinced him to write books about his theories and experiments. Pope Nicholas IV had him imprisoned because he didn?? agree with Bacon. Before his life ended Bacon made many discoveries and wrote many more books.

The Romans have been said to have used water filled glasses to read with and while watching those who were less fortunate to be in an arena they used some stones of various colors to shield their eyes. Romans were known for wanting the best out of life so its no surprise that they used stones like quartz to enhance vision or reduce glare

Salvino D??rmate invented the first known official pair of eyeglasses around 1284 in Italy. Alessandro Spina has been also said to be the first. Italians introduced eyeglasses to the Chinese and folk loar says Chinese judges used green eyeglasses to hide their expressions while passing judgment.

Eyeglass designer and maker of scientific devices James Ayscough developed a set of eyeglasses that used clear or green lenses in 1752. Ayscough thought that the green lenses helped vision some and relieved some eye fatigue. He was an apprentice to James Mann. The two became partners in developing microscopes and the publishing of articles.

By the early part of the 1900?? well known figures helped inspire the production and use of sunglasses. In 1929 Sam Foster started selling his version of sunglasses called Foster Grants.

The polarization of sunglasses was accomplished by Edwin H. Land. Land invented polarized material that he used on sunglasses. George Wheelright and Land became partners and started in 1937 the Polaroid Corporation. Lands polarized sheeting material was use in sunglasses, 3-D movies and for military use. Later the polaroid camera came along another of Lands products.

By the 1950?? sunglasses were exploding on the scene with great stride and to present time sunglasses have become more popular than ever. Manufacturers now have improved sunglasses greatly not only providing great styles, but now sunglasses protect against UVA & UVB Lights Rays and from eye problems such as macular degeneration. So make sure you protect your eyes and your childrens.

Buy eyeglasses: discount eyeglasses? cheap eyeglasses? sunglasses online

Buy eyeglasses: discount eyeglasses? cheap eyeglasses? sunglasses online

Ultraviolet rays are present in sunlight and these can cause damage the corneas. Sunglasses help give your eyes protection from the dangerous UV rays, and good ones give your eyes 100% protection. A coating is put outside the lenses of the sunglasses which acts as a UV filter. It allows light to pass through, so you can see, but blocks out the UV light which can harm your eyes.

The most common reason people wear sunglasses is to get protection from the glare of sunlight. Powerful sunlight can make you close your eyes or narrow them, thus causing a squint. This is a natural reaction which protects the corneas. It is not just bright sunlight which can cause damage, but also glare from the snow, because snow reflects the sunlight highly intensified and magnified, so it can be even more dangerous.

Sunglasses are tinted according to your requirements, based on how much light protection is needed. Just as there are different types of light, the various shades of the lenses of sunglasses also protect your eyes in their differing ways. Among the good lens colors are gray and almost black which give the most protection from powerful light, at the same time not distorting colors.

Of utmost importance is the fact the sunglasses safeguard your eyes from glare. The sunlight reflects off water and shiny surfaces which amplify the light and cause glare, which can be blinding if you don?? wear sunglasses and can even cause accidents. Good sunglasses shield eyes from this kind of glare.

Just as sound waves vibrate so do light waves and when a group comes together, the result is a glare. If you get blinded by glare off water or glass (like the windshield of a car), you see a combination of light waves. There are polarization filters which are used in the lenses of sunglasses which realign the waves and thus get rid of the glare.

Sunglasses can eradicate particular light frequencies which can cause vision to blur or change colors. Therefore selecting the correct color of the lenses of the sunglasses helps them protect your eyes in different conditions.

If you want to block out blue light, then you ought to be wearing sunglasses whose lenses are yellow, gold, amber or brown. Blue light is the major color which causes blurred vision. Even though yellow lenses have a tendency to distort other colors, their benefits far outweigh their disadvantages.

Similar to yellow lenses, green lenses also filter blue light and help in protecting eyes from glare. Their higher contrast features and the fact that they offer great visual sharpness also make them extremely popular. Other colored lenses are rose and purple, and they give the best contrast and protection in the green or blue background. That is why they are good for hunting and water skiing.

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Choosing the Perfect Eyeglasses; Eyeglass Frames or Rimless Eyeglasses
Article Source: http://EzineArticles.com

When you put on a new pair of eyeglasses, it can change your whole appearance. You can go from drab and boring to sleek and sexy by choosing the right pair. You want to pick something that matches your personality and lifestyle. Most people can benefit from more than one pair of eyeglasses especially if they have an active life. Experts agree if you are a conservative person, stay with shapes such as rectangles or ovals in either thin plastic or metals. Rimless eyeglasses and three-piece mountings can also be a good choice. For you more creative types, modern shapes work best in thicker or larger plastics. Good color choices for your eyeglass frames include blue, green and purple. If you shop on line often, you know you will get great prices on eyeglasses.

Choosing the right eyeglass frames will make or break the image you are after. There is a huge selection of different materials to choose from. If you like color, then zly or zylonite is your best option. It is super cost effective, is colorful and is light weight. If you have allergies, then we suggest proprionate which is nylon-based and again very light. Other blended nylon is the prime material for sports and performance eyeglasses. Nylon is easily molded so it is often used in the wrap around styles. Now if you like the metal look, you have a number of options. Titanium is becoming very popular because of its strength, durability and resistance to corrosion. Flexon is often referred to as “memory metal” because it can go back to its original shape if bent or damaged. If you want a pair that is super light and very trendy, rimless eyeglasses is your choice.

Now that you have the right eyeglass frames, it’s time to choose the proper lenses. We highly recommend polycarbonate lenses as they are thinner and lighter than plastic. They also offer UV protection from the sun’s harmful rays. Other great features of these lenses are they are both scratch and impact resistant. Polycarbonate lenses are recommended in sports, children’s and safety eyeglasses. All of these are available on line at a number of retailers that offer eyeglasses. They also offer a full range of designer styles including my favorite rimless eyeglasses at fantastic prices.

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