Archive for the ‘Sunglasses’ category

cheap sunglasses

July 6th, 2015

When it comes to protecting your eyes from damage by bright sunlight, actually, the study shows that there is little difference between cheap sunglasses and expensive ones. It turns out almost any pair of glasses, even cheap or untinted ones will do the trick. A pair of sunglasses seems so simple, it’s two pieces of tinted glasses or plastic in some sort of plastic or metal frame. There are four things that a good pair of cheap sunglasses should do for you.

Sunglasses provide protection from ultraviolet rays in sunlight. UV light damages the cornea and the retina, good cheap sunglasses can eliminate UV rays completely. Sunglasses provide protection from intense light. When the eye receives too much light, it naturally closes the iris. Once it has closed the iris as far as it can, the next step is squinting. If there is still too much light, as there can be when sunlight is reflecting off of snow, the result is damage to the retina. Good sunglasses can block light entering the eyes by as much as 97 percent to avoid damage. Sunglasses provide protection from glare. Certain surfaces, such as water, can reflect a great deal of light, and the bright spots can be distracting or can hide objects. Good cheap sunglasses can completely eliminate this kind of glare using polarization. Sunglasses eliminate specific frequencies of light. Certain frequencies of light can blur vision, and others can enhance contrast. Choosing the right color for your sunglasses lets them work better in specific situations.

When you buy a pair of cheap sunglasses, you need to make sure all of these benefits and these sunglasses can protect your eyes well. It is possible to buy sunglasses for 20 bucks, which will also protect your eyes as much as a pair that costs 300 dollars. Even in countries like Australia, the price of sunglasses does not matter because the country has standards for these sunglasses and they should all be in conformity with the law for the UV standards. In Europe there are no standards yet accepted which should be in conformity with all the sunglasses.

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Photochromic sunglasses

July 6th, 2015

Photochromic sunglasses are equipped with photochromic lenses, which darken substantially in response to UV light in less than one minute and then continue to darken very slightly over the next fifteen minutes. The lenses will begin to clear as soon as they are away from UV light, and will be noticeably lighter within two minutes and mostly clear within five minutes. However, it normally takes more than fifteen minutes for the lenses to completely fade to their non-exposed state. The best quality photochromic lenses can offer very quick transition times.

Sunglasses or prescription eyeglasses that darken when exposed to the sun were first developed by Corning in the late 1960s and popularized by Transitions in the 1990s. In fact, because of the extreme popularity of the Transitions brand, these lenses are usually referred to as transition lenses. The correct term for these glasses is photochromic or photochromatic, which refers to a specific chemical reaction the lenses have to ultraviolet (UV) radiation.

Photochromic lenses have millions of molecules of substances such as silver chloride or silver halide embedded in them. The molecules are transparent to visible light in the absence of UV light, which is normal for artificial lighting. But when exposed to UV rays, as in direct sunlight, the molecules undergo a chemical process that causes them to change shape. The new molecular structure absorbs portions of the visible light, causing the lenses to darken. The number of molecules that change shape varies with the intensity of the UV rays. When you go indoors and out of the UV light, a different chemical reaction takes place. The absence of the UV radiation causes the molecules to snap back to their original shape, resulting in the loss of their light absorbing properties. In both directions, the entire process happens very rapidly. An important note about photochromic lenses: because they react to UV light and not to visible light, there are circumstances under which the darkening will not occur. A perfect example of this is in your car. Because the windshield blocks out most UV light, photochromic lenses will not darken. For this reason, most sunglasses with photochromic lenses also have a certain amount of tint already applied to them.

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Stylish sunglasses

June 30th, 2015

Stylish sunglasses are a form of protective eyewear designed primarily to prevent bright sunlight and high-energy visible light from damaging or discomforting the eyes. These stylish sunglasses can sometimes also function as a visual aid, as variously termed spectacles or glasses exist, featuring lenses that are colored, polarized or darkened. One of the most widely iconic styles of summer is a stylish pair of sunglasses, but they are not all created equal. Too block out all of the sun’s harmful UVA and UVB rays, the best sunglasses will have a UV 400 rating or state 100%UVA/UVB protection. This means they will provide full ocular safety against the detrimental effects of UV radiation.

Stylish sunglasses can also be processed as prescription sunglasses which can meet the demand of people who have eye problems but are keen to explore the outdoors during bright sunny days. Though a number of wraparound sunglasses are not compatible with prescription lenses and their severely curved wraps sometimes cause vision distortion.

In terms of colors, stylish sunglasses with brown shades are much more preferable than other colors. Brown is considered the best color for sunglasses since it provides the wearer with the widest light spectrum and is also known to block blue light effectively and offer optimum contrast. Gray, on the other hand, is best for bright environment, particularly if the wearer is going to the beach where the brightness of the sun’s rays is magnified by the water. Some stylish sunglasses are designed as photochromic eyepieces. Photochromic glasses have the ability to darken in sunny conditions and revert to a lighter shade when the wearer moves indoors. Some experts have warned, though, that photochromic lenses are not as effective in blocking UV rays as some sunglasses that are particularly designed for this purpose. In general, it is much better to ask an eye expert for advice or have the lenses assessed in terms of the amount of UV light that can pass through them.

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Eyeglasses with sunshade

June 22nd, 2015

Eyeglasses with sunshade offer great flexibility for people what want to use their regular eyeglasses as sunglasses. Sunshade are tinted sunglasses frames without temples featuring cushioned tabs that are designed to attach to the front of your eyeglasses and clip on to the front of your eyeglasses frames. Some sunshade with sun clips actually utilize magnets to hold the frames to eyeglasses rather than traditional clips. Both types of sun clips are easy to use; they simply clip onto the sides of regular eyeglasses and can be lifted off and stored when no longer needed. Sun clips are a great option for people who wear prescription lenses and are looking for a way to protect their eyes from the sun. Clip-on sunglasses offer great flexibility for those who do not want to invest in two separate pairs of prescription glasses. Not only are clip-on sunglasses more affordable than prescription sunglasses, they can even be polarized for enhanced comfort.

Here are a few of the benefits of eyeglasses with sunshade. They are affordable alternative to prescription sunglasses and clip on and off easily, usually with one hand. Moreover, the sunshade come in a variety of tints, which will protect your eyes against harmful UV rays. Sun clips are valued for their convenience and affordability, but there are some sacrifices that come with choosing clip on sunglasses over prescription sunglasses. Many people consider sun clips an outdated style. Since the size of the clips has to match up with the shape of the regular eyeglasses they are being clipped on, there is little flexibility when it comes to choosing styles and shapes. It is also important to keep in mind that sun clips add more weight to the nose and face. People who are used to lightweight eyewear may have a hard time adjusting to the weight of sun clip lenses.

Once you would love to choose eyeglasses with sunshade, firstly, you need to know how to measure the clip on frames. After knowing the size, you can purchase at optical store. So how to measure for clip on frames? The first step in choosing the correct sun clips frames is to compare the style of sunshade frames to the frames of the prescription sunglasses. Choose the nearest in style so that the sunshade frames will cover the entire prescription sunglasses frame. Measure the width of the glasses. Ensure that the glasses are measured in the middle. If the sunshade are not available in the same size as the prescription glasses, it is important to make sure they are slightly larger. This ensures that the eyes are completely protected from the sun. Not all sunshades are measured in inches; some are simply classed as small, medium and large.

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about pilot sunglasses

June 17th, 2015

Sunglasses are important protective devices for pilots. Pilot sunglasses can reduce visual fatigue, thereby reducing the possibility of pilot error. A good pair of sunglasses can also protect the eyes and vision from ultraviolet radiation too. For a pilot, choosing sunglasses is a difficult task because of the variety of types available and because marketing often addresses fashion rather than performance.

Actually, choose the type of pilot sunglasses will depend on your aircraft, the environment in which you fly, and your personal preference. Moreover, the features which are important in choosing sunglasses for flying can be considered as filter factors and frame factors. When it comes to filters, the total light transmittance should be taken into consideration, because Light striking the front of the filter can be reflected or absorbed, or can pass through the filter. The amount of light passing through the filter is called the transmittance, and the smaller this number, the stronger/darker the filter. For pilots, the optimal transmittance is 16% to 20%. Below 15% there is reduced visual acuity and color discrimination, even with neutral density filters. A filter with no tint is described as a neutral density filter. This reduces the total light incident on the eye, while preserving the relative proportion of different wavelengths Neutral grey is the best general purpose tint for flying, as this produces a neutral density filter. A filter with a tint will appear to be colored when held up to light. This is because it is absorbing the other colors in the spectrum. A green filter appears green, for example, because it is absorbing red and other wavelengths of light. The second factor is UV protection. UV (ultraviolet) light is harmful to the eyes and to the surrounding skin. It is a risk factor in cataract, age-related macular degeneration, and skin cancers. The intensity of UV radiation increases by 4% per 1000 feet of altitude. Stratospheric ozone shields the earth’s surface from UV light. Low altitude flight in geographical regions where the ozone layer is depleted, and flight in or above the ozone layer anywhere in the world, both carry an increased risk of UV damage. Flying over snow, sand and water increases UV exposure, as UV light is reflected. It is recommended that all pilot sunglasses block 100% of UVA, UVB and UVC. The last factor should be taken into consideration is polarizing filters. These work by selectively blocking plane polarized light. Light becomes plane polarized when it is reflected towards the observer. These glasses are therefore excellent for dealing with situations where large amounts of light is reflected from surfaces such as snow, sand or water. However, aircraft windscreens are often either intentionally or unintentionally polarized in the manufacturing process. When a wearer looks through the windscreen, they see Moiré patterns. These are interference patterns caused by interaction of two sets of polarized filters. Moreover, Some LCD displays emit polarized light. These displays can dim or disappear when the pilot rotates their head to look at them. Polarized sunglasses are, however, useful for seeing submerged objects in water. They therefore have limited, specific applications in aviation, such as fixed wing open cockpit or rotary wing doors off, for a crewmember or pilot non-flying looking out of the aircraft.

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about Oversized sunglasses

June 15th, 2015

Oversized sunglasses are an important addition to any wardrobe. Oversized sunglasses are fashionable sunglasses that have oversized lenses practically covering almost of your face. They speak for you, share your mood with the world and hint at the nonchalant attitude of movie stars. The style became popular in the 60s when First Lady Jackie Kennedy, a fashion symbol of her time, started wearing them to keep a low and discreet profile. Since then, many celebrities have embraced the oversized trend. Moreover, the larger the sunglasses, the more readily they protect the eyes from sun exposure. So it is a good thing that fashion has brought oversized sunglasses back into style for everyone.

Oversized cool sunglasses have been in the fashion scene for years now, but you can definitely still use them. Oversized sunglasses can definitely pull off an amazing look to every person who would wear them. Wearing this kind of sunglasses can help you out in adding elegance and class to your look. Moreover, the fashionable oversized sunglasses can help you hide blemishes on your face. Other sunglasses cannot fulfill this job. Besides, the fashionable oversized sunglasses can definitely protect your eyes from the sun. It can effectively protect from harmful UVA and UVB rays of the sun while having an amazing fashion style. Most importantly, the oversized sunglasses are suitable for every kind of face shape. Aside from its many benefits, you can also easily find a good pair of oversized trendy sunglasses.

You can buy it for more affordable and reasonable price. Since there are a lot of brands that make oversized lens and frames for their sunglasses. You can easily find stores offering them at a much lower pricing. These fashion sunglasses can definitely be worn at parties, because these oversized cool sunglasses at parties can definitely make you look hotter and sexier.

Generally, if you are looking for a great fashion accessory, oversized sunglasses are definitely a good choice. Oversized fashion sunglasses are still one of the favorites of many people which are not very surprising as we all know that it has lots of benefits. You better have your own piece of these cool sunglasses and experience being cool and hot without giving in too much effort.

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about Clip on Sunglasses

June 15th, 2015

Clip on sunglasses are an ideal way for wearers who wear prescription glasses to protect their eyes from the sun. This kind of sunglasses will clip right onto regular prescription eyeglasses, allowing the wearer to see clearly while shading and protecting the eyes. Clip on sunglasses will offer you convenience, available and affordable price than normal prescription sunglasses.

There are three main types of clip on sunglasses available. The type worth of your purchase depends on factors such as your lifestyle, budget and circumstances. Each type of clip on sunglasses can be purchased in a variety of colors, sizes and styles. The first type is custom clip on sunglasses. The custom clip on sunglasses clip to the middle of the bridge on prescription eyeglasses. The clips are rubber coated so they do not damage the frame or the lenses of the eyeglasses, but they are the least expensive type of clip on sunglasses. The clips on standard clip on sunglasses are the most noticeable of all the types available. The second type is flip clip on sunglasses. The main feature of the flip clip on sunglasses is that they clip over the prescription eyeglasses and can be flipped up or down according to the lighting condition. In this way, you do not need to be constantly removed and put back on. The clips on flip clip-on sunglasses are much smaller than standard clip-on sunglasses and are therefore not as noticeable. Moreover, they are also less likely to damage prescription eyeglasses as they do not need to be constantly removed. However, the hinge on flip clip on sunglasses can easily break. The third type is magnetic clip on sunglasses. Magnetic clip on sunglasses use a clear magnet which attaches to the prescription glasses. They have no clips so they are barely noticeable. They can only be used on frames which are magnetic (i.e. metal), and so cannot be used on plastic frames. They fit directly onto the frame, and therefore the magnetic clip-on must be exactly the correct size for them to block the sun. Magnetic sunglasses are the most expensive clip-on sunglasses available.

Not only there are different types of clip on sunglasses, but also they comes in different styles. While older versions were often bulky or unattractive, today they come in different varieties, such as rimless styles, which are lighter and offer a more streamlined appearance. They are also designed to fit over most styles of plastic and metal. Clip on sunglasses are offered from the simplest styles to high end designer fashions. Since they are more affordable than prescription sunglasses, some people choose more than one pair so they can wear different styles for different outings. Many are designed to be conveniently flipped up when entering a building or when the sun passes behind clouds. There are also holders that you can purchase to attach to the visor in your car so you can store your sunglasses and keep them handy.

Once you would love to choose clip on sunglasses, firstly, you need to know how to measure the clip on frames. After knowing the size, you can purchase at optical store. So how to measure for clip on frames? The first step in choosing the correct clip-on frames is to compare the style of clip-on frames to the frames of the prescription sunglasses. Choose the nearest in style so that the clip-on frames will cover the entire prescription sunglasses frame. Measure the width of the glasses. Ensure that the glasses are measured in the middle. If the clip-on sunglasses are not available in the same size as the prescription glasses, it is important to make sure they are slightly larger. This ensures that the eyes are completely protected from the sun. Not all clip-on sunglasses are measured in inches; some are simply classed as small, medium and large.

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about polarized sunglasses

June 15th, 2015

What are polarized sunglasses? Polarized sunglasses are designed to reduce the glare especially from the surfaces like water, snow, and glass. It is commonly used in sports such as driving and fishing by helping the wearers in these activities to see more clearly, allowing for the avoidance of potential hazards. Since light is made up for waves travelling in different directions. Vertical light is useful to the human eye. It help us to see. However horizontal light simply creates glare. Glare is concentrated light reflecting off a horizontal shiny surface, such as a car windscreen, sand, water, and snow or asphalt roads. It reduces visibility and can make it uncomfortable, painful and even dangerous to carry on driving, cycling, skiing or just sunbathing.

As we all know that we see by virtue of the light that enters our eyes in sunny days. Without good sunglasses, brightness and glare results in a loss of visual performance, which is produced when an object or light source in the field-of-vision is brighter than the amount of light to which the eyes are adapted. Most sunglasses will provide some absorption to dampen brightness, but only polarized sunglasses can effectively eliminate blinding glare. However, polarized sunglasses are not recommended to pilots. Polarized lenses eliminate reflected glare from a flat surface. However, looking through a laminated aircraft windscreen, while wearing polarized lenses can result in a reduced retinal image. Also some windscreen of aircraft is already polarized, hence polarized sunglasses result in double polarization. Moreover, some 3-D movies also use polarizing lenses. Usually one lens is horizontally polarized and the other one is vertically polarized, so that each eye sees a slightly different version of the movie screen. The eyes attempt to reconcile the two images for the brain, and the result is the illusion of a three dimensional image. Experimenters with several spare pairs of 3-D glasses lying around can play with the effects of polarization for themselves.

Since we have already know the usage of polarized sunglasses, how do I know if my sunglasses are polarized? If you have the same doubt, you can just look through the glasses at the reflection of any object on a window panel. Then, turn the sunglasses around as if they were the hands of a clock facing you. If the intensity of the reflection doesn’t change with respect to what you see through the window, they are not polarized. Another way is to hold them at 90° to another pair labeled as polarized and if the lenses go dark where the lenses overlap, then your sunglasses are polarized too. If there’s no change, your lenses aren’t polarized. Moreover, not all polarization is equal. Because not all polarized sunglasses block glare as well as they should. A polarizing filter is no guarantee of an effective glare-blocking lens. It depends on the quality of the filter and how the lens has been produced. Cheap polarized sunglasses may only cut out 10% of reflected light, but many people don’t realize there is a difference in filter quality in better made glasses. For example, Julbo’s Polycarbonate Polarized lenses cut out around 60-70% of reflected light, and ther NXT Cameleon, Octopus and Polar HD lenses cut out 99% of reflected light.

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About bifocal sunglasses

June 11th, 2015

Bifocal sunglasses, with two different prescriptions in the same lenses, is to correct myopia, hyperopia and/or astigmatism while blocking sun’s harmful rays. Bifocal sunglasses are great for reading maps, menus, books and newspapers easily, tying on your lure while fishing, marking the scorecard during a round of golf, or anything where you want to see up close while still protecting your eyes from the sun. When you look up, the top half lets you automatically see in the distance without constantly changing back and forth from one pair to the next.

Today, there are many different types of bifocal sunglasses available. Equal division lenses, segmented bifocals and blended lenses also called seamless or invisible bifocals, are three main types of bifocals. Benjamin Franklin is generally credited with invention of bifocals. Original bifocals were designed with the most convex lenses (for close viewing) in the lower half of the frame and the least convex lenses on the upper. Up until the beginning of the 20th century two separate lenses were cut in half and combined together in the rim of the frame. The mounting of two half lenses into a single frame led to a number of early complications and rendered such spectacles quite fragile. A method for fusing the sections of the lenses together was developed by Louis de Wecker at the end of the 19th century and patented by Dr. John L. Borsch, Jr. in 1908. Today most bifocals are created by molding a reading segment into a primary lens and are available with the reading segments in a variety of shapes and sizes. Bifocal lenses are available with the reading segments in a variety of shapes and widths including bifocal sunglasses options. The most popular reading bifocal is the flat-top known as straight-top or D segment, 28 millimeter wide.

Bifocal sunglasses can cause headaches and even dizziness in some users. Though most people who require bifocals have difficulty focusing on objects both up close and far away, they have always been designed with the corrective lens for close range focusing at the bottom and the corrective lens for distance vision at the top. While this design once made sense, because close range focusing was generally required for reading and writing, activities traditionally preformed while looking down, more and more people find it awkward to use such lenses with a computer. Since the computer monitor is directly in front of the user, the up close corrective lens seems out of place on some glasses.

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About RETRO & VINTAGE SUNGLASSES

June 11th, 2015

While even in prehistoric time Inuit peoples wore flattened walrus ivory glasses to block harmful reflected rays of the sun, the earliest historical reference to sunglasses dates back to ancient China and Rome. The Roman emperor Nero watched gladiator fights through polished gems.In China, sunglasses were used in the 12th century or possible earlier. These sunglasses were made out of lenses that were flat panes of smoky quartz. They offered no corrective powers nor they protect from harmful UV rays but did protect the eyes from glare. Ancient documents describe the use of such crystal sunglasses by judges in ancient Chinese courts to hide their facial expression when they interrogated witnesses. Today, sunglasses with UV protection has almost become an industry standard, and there are a lot of tints available for sunglasses, and sunglasses styles are changing every year.

Retro vintage sunglasses refers to sunglasses frames that are more than 20 years old. So there are some vintage eyewear specialty shops sell used frames collected from old optical shops and other sources, some of which have never been worn. However, with their distinctive qualities of a past era, nowadays vintage eyeglasses were merely reproductions of those from past eras. However, the vintage label convey certain elements of styles as well. Popular vintage sunglasses styles include horn-rimmed frames in a dark color, often crafted of tortoiseshell or horn; the browline frames lying close to the eyebrows; Clubmaster frames had rimless bottoms and dark frames straight across the top; wire-rimmed aviator frames which wear straight across the top with rounded bottoms; Wayfarers are usually of tortoiseshell or black plastic, wire frames in round or modified squares with round edges. Round metal frames made popular by John Lennon are all sought after by vintage eyewear fans.

Even though there are variety of vintage sunglasses styles, choosing a suitable pair for your face shape should base on the doctrine that the fame should be contrast to your face shape, for example, a round or oval shape is usually the most appropriate vintage sunglasses choice for those with square-shaped or oblong-shaped faces while rectangular frames and other angular styles tend to complement round faces. Large vintage sunglasses frames are generally best suited for faces that are wide or long as they tend to overpower small faces. However, vintage sunglasses for women tend to have smaller frames than those designed for men. Women who find these frames inadequate for their facial features may opt for men’s vintage frames in slim styles as these may prove to be more appropriate for their facial size and features.

Whether the vintage sunglasses are suitable for you or not, which based on your lifestyle. Those planning to wear their vintage sunglasses will find that selecting a frame in keeping with the dress style of their profession will prove beneficial, with cat-eye glasses more appropriate in informal settings while Aviators or horn rims are the vintage frames of choice in more formal work places.