Sometimes we may feel excited about our newly purchased glasses for the famous brand and reasonable price, but have you ever considered how much does the pair of glasses worth? An expert on glasses once revealed: no matter how excellent the glasses are, the real cost will be no more than 200 dollars! Some people may be shocked by this, but believe it or not, that’s the firm truth. You may also feel frustrated by this, but our attention is to inform you of the truth and pull you out of another foolish self-chuckle.
Then why do those greedy glasses dealers sell the glasses at such high prices? The reason lies in that they have to guarantee profit no matter whether the sale is good or not. The margin of profit can reach as high as 500% of the real cost! The rent of the retailing stores greatly contributes to the high selling price, especially in those town centers and busy streets. There the rent is very high and the businessmen have to add this part of expense to the price of the glasses. So the customers finally pay for the rent! Another reason is the existence of the middle-dealers. To ensure the profit of the producers, there are such rules: if one wants to buy from the producers, the smallest ration is above several hundred pairs. But for most small shops, they can never manage to sell all these in short period of time. At the same time the glasses are quickly updated, if they don’t sell the glasses in time, they will never sell them, thus causing waste of money. So small dealers will choose to get their goods from second hand or even third hand. The cost is naturally becoming higher for the glasses have had the responsibility of feeding dozens of people: the producer, the first-hand dealer, the second-hand dealer…and the retailing seller. Let’s recall: have you ever see crowds of people in a glasses shop? Never! Seldom! Yes, the sellers also notice this; sometimes the single day’s turnover can be 0! How do they guarantee the profit from the limited pairs of glasses? Yes, raise the price of the glasses!
After revealing all the hidden principles of glasses industry, we may feel shocked and unbelievable. But we have to use glasses, and what can we do to avoid such cheating act? The reasons are there apparently and the answer can be easy. The high cost of glasses exists in the expense on rent and middle-dealers. If we buy glasses from sellers who eliminates these two main wasting approaches, the price will be much more reasonable. Yes, the online shops! They are ideal choices for the save of money. Here I strongly recommend you the www.glassesshop.com.They don’t need the rent and they buy the products from one of the world’s biggest glasses manufacturers—Dnyang glasses center. Both the qualities and the prices are very appealing. You may as well go and have a look!
The choice of the glasses is a challenge for some. The test to appear outside that the models match your aspect as well as your lifestyle can be completely stressing. The following stages will guide you by finding the glasses which as well as adapt both your single personality your face.
Difficulty: Average
Necessary time: A few hours
Here ’s how:
Go for an examination of eye
Before you start to look at glasses, you will have to determine your refringent error. A doctor of eye will examine your acuity and will find your regulation of monocle. A regulation indicates the quantity of necessary precise power to correct the nearsightedness, the farsightedness and the astigmatism.
Look at the reinforcements of monocle
To obtain a direction whose models call upon you, you will have to look at a series of reinforcements. The reinforcements of monocle are available in several colors and forms. Review the Internet for standard models. Reverse by stores, noting the models which call upon you. Some Web sites allow you practically test above reinforcements on a downloaded photograph.
Find an optician
Authorized opticians are trained to help of the people to choose glasses. An optician will be able to recommend the reinforcements which as well as flatter your facial structure your tonality of skin. A well trained optician will propose several models of reinforcement so that you test yourselves and for also take care to carry out the perfect adjustment to take account of your best vision. Your optician can also offer monocle-to make services. The outlets for the retail sales of monocle, reciprocally, have usually opticians on the personnel, as well.
Consider the options of objective
You have many options when it comes to the objectives, including the material from which an objective is made. Some prefer the light polycarbonate objectives, although they tend to being more expensive than the regular objectives out of glass or plastic. Your optician can recommend a mean and light objective if you have a high regulation. Moreover, there are several coatings of objective which can call upon you, including the stripe-resistant coatings, the anti-r3fl chissants colours UV and coatings.
Ends:
1.Try on reinforcements with a friend. Ask honest opinions.
2.Take your time. You will have these glasses during some time.
3.Consider by second pairs. He ’s always smart to have the glasses of help.
Of what you have need:
* A regulation of monocle
* A great choice of the reinforcements
* An honest friend
Eyewear online shopping is very popular now. You can buy eyewear online cheaply and comfortably. Unfortunately this particular market has been plagued by fraudulent marketers of ersatz designer. Here are some tips for avoiding a dud purchase.
1. Be careful with the photos.
You should not buy an item without seeing a very detailed picture first. If the is fake you will soon see pick it up from the eyewear photo. Top designer has great detail, great finishes.
2. Take the cue from the seller.
Always start your search at the website of the manufacturer of your favorite brand. Look carefully at the photos there. Compare these with the photos on other websites. Beware of identical photos copied directly from the website you are shopping in. Compare the specifications of the product to the specifications they promise. Obviously they should match.
3. Avoid extremely low price.
If the price is extremely low then it is probably a fake.
4. Must have the warranty
The manufacture generally offers a warranty via its distributors, so the presence of an after sales service offer in the item description is a good indicator for a genuine product.
5. Remember to check the extras.
Genuine designer usually comes with the manufacturer’s designer case and a branded cloth. Make sure the offer you are considering includes these.
6. Where the seller is from?
It is a proven fact that over 80% of fake? originates in the Far East. Don’t be taken in by the big names such as Chanel, Dior and Prada from Far East distributors. There are some genuine dealers but you should be suspicious of sellers who offer a whole list of designer.
7. Check buyer feedbacks or customers reviews.
The feedback on the online shop is useful. Check this to find out whether previous buyers were satisfied with the designer they received. Look out for mentions of poor quality products or products that were never received. You can also learn a lot from the seller’s replies to negative feedback. The genuine seller will be worried about their reputations!
Seven Tips to Avoid Fake Eyewear Online
article source: ezinearticles.com
Eyewear online shopping is very popular now. You can buy eyewear online cheaply and comfortably. Unfortunately this particular market has been plagued by fraudulent marketers of ersatz designer. Here are some tips for avoiding a dud purchase.
1. Be careful with the photos.
You should not buy an item without seeing a very detailed picture first. If the is fake you will soon see pick it up from the photo. Top designer has great detail, great finishes.
2. Take the cue from the seller.
Always start your search at the website of the manufacturer of your favorite brand. Look carefully at the photos there. Compare these with the photos on other websites. Beware of identical photos copied directly from the website you are shopping in. Compare the specifications of the product to the specifications they promise. Obviously they should match.
3. Avoid extremely low price.
If the price is extremely low then it is probably a fake.
4. Must have the warranty
The manufacture generally offers a warranty via its distributors, so the presence of an after sales service offer in the item description is a good indicator for a genuine product.
5. Remember to check the extras.
Genuine designer usually comes with the manufacturer’s designer case and a branded cloth. Make sure the offer you are considering includes these.
6. Where the seller is from?
It is a proven fact that over 80% of fake? originates in the Far East. Don’t be taken in by the big names such as Chanel, Dior and Prada from Far East distributors. There are some genuine dealers but you should be suspicious of sellers who offer a whole list of designer.
7. Check buyer feedbacks or customers reviews.
The feedback on the online shop is useful. Check this to find out whether previous buyers were satisfied with the designer they received. Look out for mentions of poor quality products or products that were never received. You can also learn a lot from the seller’s replies to negative feedback. The genuine seller will be worried about their reputations!
Magnifying lenses which are used to treat mild hyperopia and presbyopia, normally referred to as reading eyewear, can be bought off the shelf. Most eyewear are made to an individual prescription, based on degree of myopia or hyperopia combined with astigmatism if applicable. Lenses can be ground to specific prescriptions, but in some cases standard off-the-shelf prescriptions suffice, though they require custom fitting to particular frames.
As people age, their ability to focus is lessened and many decide to use multiple-focus lenses, bifocal or even trifocal to cover all the situations in which they use their sight. Traditional multifocal lenses have two or three distinct horizontal viewing areas, each requiring a conscious effort of refocusing. Some modern multifocal lenses, such as Progressive lenses (known as “no-line bifocals”), give a smooth transition between these different focal points, unnoticeable by most wearers, while other eyewear have lenses specifically intended for use with computer monitors at a fixed distance. People may have several pairs of eyewear, one for each task or distance, with specific eyewear for reading, computer use, television watching, and writing.
Rimless
Three-piece rimless and semi-rimless eyewear are common variations that differ from regular eyewear in that their frames do not completely encircle the lenses. Three-piece rimless eyewear have no frame around the lenses, and the bridge and temples are mounted directly onto the lenses. Semi-rimless (or half-rimless) eyewear have a frame that only partially encircles the lenses (commonly the top portion). When the style was first introduced in the 1930s, lenses were screwed directly to the front of the frame; most modern variations feature the lenses held inside of the frame by high strength nylon wire,[13] although the semi-rimless style has been around since at least the 1940s. A rare and currently noncommercial variation are rimless and frameless eyewear attached to a piercing at the bridge of a wearers nose.[14] Such eyewear have the visual look of the pince-nez.
Glazing
Spectacle lenses are edged into the frame’s rim using glazing machines operated by ophthalmic technicians. The edging process begins with a trace being taken of the frame’s eye shape. In earlier days the trace was replicated onto a plastic pattern called a Former. Nowadays the process is patternless and the shape is sent to the edger electronically.
The lens, in the form of a round uncut, is positioned in the correct manner to match the prescription and a block is stuck to the lens and that block fits into a chuck in the edging machine. A diamond coated wheel spins as the edger replicates the frame’s eye-shape to the uncut lens. A ‘v’ bevel is applied to allow the edge of the lens to fit into the frame rim.
Glasses can be a major part of personal image and expression, from Groucho Marx and Buddy Holly to the extravagance of Elton John and Dame Edna Everage.
For some celebrities, glasses form part of their identity. United States Senator Barry Goldwater continued to wear lensless horn-rimmed spectacles after being fitted with contact lenses because he was not recognizable without his trademark glasses. British soap star Anne Kirkbride had the same problem: her character on Coronation Street, Deirdre Barlow, became so well-known for her big frames that she was expected to wear them at social gatherings and in international tours, even though Kirkbride has always worn contact lenses. Comedian Drew Carey continued to wear glasses for the same reason after getting corrective laser eye surgery. British comedic actor Eric Sykes, who became profoundly deaf as an adult, wears glasses that contain no lenses; they are actually a bone-conducting hearing aid. Masaharu Morimoto wears glasses to separate his professional persona as a chef from his stage persona as Iron Chef Japanese. John Lennon wore his round-lens ‘Windsor’ spectacles from some of his time with the Beatles to his murder in 1980. The rock band Weezer is known for some of the members wearing thick-rimmed glasses.
In popular culture, glasses were all the disguise Superman and Wonder Woman needed to hide in plain view as alter egos Clark Kent and Diana Prince, respectively. An example of halo effect is seen in the stereotype that those who wear glasses are intelligent or, especially in teen culture, even geeks and nerds. Some people who find that wearing glasses may look ‘nerdy’ turn to contact lenses or laser eye surgery, especially under peer pressure.
Another unpopular aspect of glasses is their inconvenience. Even through the creation of light frames, such as those made of titanium, very flexible frames, and new lens materials and optical coatings, glasses can still cause problems during rigorous sports. The lenses can become greasy or trap vapour when eating hot food, swimming, walking in rain or rapid temperature changes (such as walking into a warm building from cold temperatures outside), reducing visibility significantly. Scraping, fracturing, or breakage of the lenses require time-consuming and costly professional repair, though modern plastic lenses are almost indestructible and very scratch-resistant.
Apple, Inc. co-founder Steve Wozniak had a pair of eyeglasses made with lenses in the shape of the well-known Apple logo. The lenses were made from a block of acrylic, laminated from layers in the usual rainbow colors, and machined into the appropriate outline, with a custom-made frame in the same shape. They were made by a Silicon Valley optician.
Corrective lenses modify the focal length of the eye to alleviate the effects of nearsightedness (myopia), farsightedness (hyperopia) or astigmatism. As people age, the eye’s crystalline lens loses elasticity, resulting in presbyopia, which limits their ability to change focus.
The power of a lens is generally measured in diopters. Over-the-counter reading glasses are typically rated at +1.00 to +4.00 diopters. Glasses correcting for myopia will have negative diopter strengths. Lenses made to conform to the prescription of an ophthalmologist or optometrist are called prescription lenses and are used to make prescription glasses, which are then verified correct using a professional lensmeter.
Safety
Safety glasses are usually made with shatter-resistant plastic lenses to protect the eye from flying debris. Although safety lenses may be constructed from a variety of materials of various impact resistance, certain standards suggest that they maintain a minimum 1 millimeter thickness at the thinnest point, regardless of material. Safety glasses can vary in the level of protection they provide. For example, those used in medicine may be expected to protect against blood splatter while safety glasses in a factory might have stronger lenses and a stronger frame with additional shields at the temples. The lenses of safety glasses can also be shaped for correction.
Safety
Some safety glasses are designed to fit over corrective glasses or sunglasses. They may provide less eye protection than goggles or other forms of eye protection, but their light weight increases the likelihood that they will actually be used. Modern safety glasses tend to be given a more stylish design in order to encourage their use. Corrective glasses with plastic lenses can be used in the place of safety glasses in many environments; this is one advantage that they have over contact lenses.
There are also safety glasses for welding, which are styled like wraparound sunglasses, but with much darker lenses, for use in welding where a full sized welding helmet is inconvenient or uncomfortable. These are often called “flash goggles”, because they provide protection from welding flash.
Worker safety eyewear is available in various lens colors and/or with coatings to protect or enable eyesight in different lighting conditions, particularly when outdoors.
Nylon frames are usually used for protection eyewear for sports because of their lightweight and flexible properties. They are able to bend slightly and return to their original shape instead of breaking when pressure is applied to them. Nylon frames can become very brittle with age and they can be difficult to adjust.
Sunglasses
Sunglasses may be made with either prescription or non-prescription lenses that are darkened to provide protection against bright visible and possibly ultraviolet light.
Glasses with photosensitive lenses, called photochromic lenses, become darker in the presence of UV light. Unfortunately, many car windshields block the passage of UV light, making photochromic lenses less effective whilst driving on bright days. Still, they offer the convenience of not having to carry both clear glasses and sunglasses to those who frequently go indoors and outdoors during the course of a day. Recent technology has developed specialized photochromic lenses that work behind the windshield of the car, as well as outside of the car.
Light polarization is an added feature that can be applied to sunglass lenses. Polarization filters remove horizontally polarized rays of light, which can cause glare. Popular among fishermen and hunters, polarized sunglasses allow wearers to see into water when normally glare or reflected light would be seen. Polarized sunglasses may present some difficulties for pilots since reflections from water and other structures often used to gauge altitude may be removed, or instrument readings on liquid crystal displays may be blocked.
Yellow lenses are commonly used by golfers and shooters for their contrast enhancement and depth perception properties. Brown lenses are also common among golfers, but cause color distortion. Blue, purple, and green lenses offer no real benefits to vision enhancement and are mainly cosmetic. Some sunglasses with interchangeable lenses have optional clear lenses to protect the eyes during low light or night time activities and a colored lens with UV protection for times where sun protection is needed. Debate exists as to whether “blue blocking” or amber tinted lenses have a protective effect.
Sunglasses are often worn just for aesthetic purposes, or simply to hide the eyes. Examples of sunglasses that were popular for these reasons include teashades and mirrorshades.
3D Glasses
The illusion of three dimensions on a two dimensional surface can be created by providing each eye with different visual information. Classic 3D glasses create the illusion of three dimensions when viewing specially prepared images. The classic 3D glasses have one red lens and one blue lens. 3D glasses made of cardboard and plastic are distributed at 3D movies. Another kind of 3D glasses uses polarized filters, with one lens polarized vertically and the other horizontally, with the two images required for stereo vision polarized the same way. Polarized 3D glasses allow for color 3D, while the red-blue lenses produce a dull black-and-white picture with red and blue fringes.
One kind of electronic 3D spectacles uses electronic shutters, while virtual reality glasses and helmets have separate video screens for each eye. A 3D effect can also be produced using LCD shutter glasses
The earliest historical reference to magnification dates back to ancient Egyptian hieroglyphs in the 8th century BC, which depict “simple glass meniscal lenses”. The earliest written record of magnification dates back to the 1st century AD, when Seneca the Younger, a tutor of Emperor Nero, wrote: “Letters, however small and indistinct, are seen enlarged and more clearly through a globe or glass filled with water”. Emperor Nero is also said to have watched the gladiatorial games using an emerald as a corrective lens.
Sunglasses, in the form of flat panes of smoky quartz, protected the eyes from glare and were used in China in the 12th century or possibly earlier. However, they did not offer any corrective powers.
Invention of eyewear
Around 1284 in Italy, Salvino D’Armate is credited with inventing the first wearable eye glasses. The earliest pictorial evidence for the use of eyeglasses, however, is Tomaso da Modena’s 1352 portrait of the cardinal Hugh de Provence reading in a scriptorium. Another early example would be a depiction of eyeglasses found north of the Alpes in an altarpiece of the church of Bad Wildungen, Germany, in 1403.
Many theories abound for who should be credited for the invention of traditional eyeglasses. In 1676, Francesco Redi, a professor of medicine at the University of Pisa, wrote that he possessed a 1289 manuscript whose author complains that he would be unable to read or write were it not for the recent invention of glasses. He also produced a record of a sermon given in 1305, in which the speaker, a Dominican monk named Fra Giordano da Rivalto, remarked that glasses had been invented less than twenty years previously, and that he had met the inventor. Based on this evidence, Redi credited another Dominican monk, Fra Alessandro da Spina of Pisa, with the re-invention of glasses after their original inventor kept them a secret, a claim contained in da Spina’s obituary record.
Other stories, possibly legendary, credit Roger Bacon with the invention. Bacon is known to have made one of the first recorded references to the magnifying properties of lenses in 1262, though this was predated by Alhazen’s Book of Optics in 1021. Bacon’s treatise De iride (“On the Rainbow”), which was written while he was a student of Robert Grosseteste, no later than 1235, mentions using optics to “read the smallest letters at incredible distances”. While the exact date and inventor may be forever disputed, it is almost certain that spectacles were invented between 1280 and 1300 in Italy. These early spectacles had convex lenses that could correct both hyperopia (farsightedness), and the presbyopia that commonly develops as a symptom of aging. Nicholas of Cusa is believed to have discovered the benefits of concave lens in the treatment of myopia (nearsightedness). However, it was not until 1604 that Johannes Kepler published in his treatise on optics and astronomy, the first correct explanation as to why convex and concave lenses could correct presbyopia and myopia.
Later developments
The American scientist Benjamin Franklin, who suffered from both myopia and presbyopia, invented bifocals in 1784 to avoid having to regularly switch between two pairs of glasses. The first lenses for correcting astigmatism were constructed by the British astronomer George Airy in 1825.
Over time, the construction of spectacle frames also evolved. Early eyepieces were designed to be either held in place by hand or by exerting pressure on the nose (pince-nez). Girolamo Savonarola suggested that eyepieces could be held in place by a ribbon passed over the wearer’s head, this in turn secured by the weight of a hat. The modern style of glasses, held by temples passing over the ears, was developed in 1727 by the British optician Edward Scarlett. These designs were not immediately successful, however, and various styles with attached handles such as “scissors-glasses” and lorgnettes remained fashionable throughout the 18th and into the early 19th century.
In the early 20th century, Moritz von Rohr at Zeiss (with the assistance of H. Boegehold and A. Sonnefeld), developed the Zeiss Punktal spherical point-focus lenses that dominated the eyeglass lens field for many years.
Despite the increasing popularity of contact lenses and laser corrective eye surgery, glasses remain very common, as their technology has improved. For instance, it is now possible to purchase frames made of special memory metal alloys that return to their correct shape after being bent. Other frames have spring-loaded hinges. Either of these designs offers dramatically better ability to withstand the stresses of daily wear and the occasional accident. Modern frames are also often made from strong, light-weight materials such as titanium alloys, which were not available in earlier times.
