Posts Tagged ‘prescription glasses’
As the name indicates, bifocal reading glasses are glasses with two distinct optical powers. These glasses are usually prescribed for presbyopic individuals who also need a correction for myopia or astigmatism. Being popular nowadays, bifocal reading glasses can be dated back to around 1760, when the America statesman and investor Benjamin Franklin first developed them. Suffering presbyopia and nearsightedness, the great man thought it was really inconvenient to switch between two pairs of prescription glasses. Even if there are still serious historians suggesting that there were others who had preceded Franklin in the invention of bifocal reading glasses, Franklin is certainly among the first to wear bifocal glasses.
An original version of bifocal reading glasses was made of the most convex lenses for close viewing in the lower half of the lens and the least convex lenses on the upper half. In the early 20th century, a new design using two separate lenses cut in half and combined together was invented. However, such a design had long been associated with a number of complications such as fragileness. At the end of the 19th century, Dr. John developed the technology of lens fusing, with which the two separate half lenses could be fused together appropriately. Nowadays, the production of bifocal reading glasses is further different. Manufacturers of bifocals usually mold a reading segment into a primary lens. In addition, such a reading segment is available in a variety of shapes and sizes, offering customized versions for individuals with specific occupations. Currently, the most popular design is the D-segment with 28mm wide.
Even if there are some design variations of bifocal reading glasses, the basic style has remained untouched since the first pair. The upper section of a bifocal lens is for distance vision and the bottom part for viewing near objects. This fundamental design is based on the fact that most people will tilt their heads slightly upwards in order to see a distant object and downwards for a near focus. This basic design enables presbyopia folks to benefit from those bifocal reading glasses in a natural way. In fact, bifocal glasses are being enjoyed by a large number of individuals with both presbyopia and nearsightedness. Bifocal glasses are generally considered healthier for people’s eyes, because the eyes can always see through the correct prescription lens. It is estimated that approximately 4 million Americans develop presbyopia each year, most of which are between 35 and 50 years old.
Firmoo.com is the emerging online eyeglasses 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/an-overview-of-bifocal-reading-glasses-1763148.html
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Eyeglasses are usually expensive investment for most individuals that they need proper protection. It is quite a common phenomenon that the spectacles may get lost and be sat on. In this case, they will probably be damaged. The most common way to protect a pair of eyeglasses is to store it in an eyeglass case. Placing eyeglasses in a case can protect them from nearly all external sources of damage. However, using an eyeglass case may be inconvenient for those folks who need to wear their prescription glasses or sunglasses occasionally. Frequently placing the glasses into the case and getting it out after a few seconds or minutes usually waste time and require enough patience. In fact, an eyeglass case is suitable for people who use eyeglasses constantly during daytime and store them only during asleep. For other individuals, they only use prescription eyeglasses during certain activities in day time. In the latter case, eyeglass holders are the right choice. As the name reflects, an eyeglass holder will help hold a pair of spare eyeglasses not being used. Those holders enable eyeglass wearers to keep their glasses at hand. There are two similar types of eyeglass holders.
The first type of eyeglass holders is exactly called eyeglass chains or leashes. They can hold the eyeglasses with two traditional silicone-style ends that easily slide over the arms or temples of the eyeglasses. Being free, a pair of eyeglasses can be held by a chain hanging on the neck. This helps users save time and gain convenience. Nowadays, eyeglass leashes or chains usually come in beaded styles. Both big and clunk beads are popularly used. Attached to eyeglass holder ends, these chains have different colors and styles. In addition, some people also suggest the eyeglass leashes can be first attached to a small split ring, which will then be attached to the eyeglass holder ends. This way allows the leach to move more naturally as the wearer moves. In some cases, eyeglass leashes as a type of eyeglass holders are also called eyeglass cords.
Another type of eyeglass holders is formally called eyeglass necklace. These eyeglass holders come in a different design. When the spectacles are being used, an eyeglass necklace hangs normally on the neck. And the glasses can be held by the necklace using a round ring after being removed. The ring will usually hold one of the temples, rather than the center bridge. These eyeglass holders are really as convenient as eyeglass leashes. These two types of eyeglass holders actually function in a similar way in holding spare spectacles.
Firmoo.com is the emerging online eyeglasses 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/two-similar-types-of-eyeglass-holders-1763600.html
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While local stores have limited options of designer spectacles, the Internet is always the best source to search appropriate products of a specific brand. In the eyeglass market, both ordinary eyeglasses and branded ones come in countless options belonging to different styles. Most eyewear users would think that non-branded eyeglasses have an amount that is higher than that of designer spectacles. This is probably true because designer glasses are to some extent unaffordable for the ordinary population. A pair of designer eyeglasses can cost several hundred dollars or even more than one thousand. While the majority of individuals have to choose regular spectacles, the market of designer spectacles is expanding in recently years. This effect is greatly contributed by the reviving economies such as China and India, where the rich groups are enlarging.
There are worldwide many brands of designer eyeglasses. Of course, they have different degrees of popularity and influence. On the Internet, it is easy for any customer to find most of the available brands, such as Adidas, Bolle, Carrera, Diesel, Gucci, Nike, Persol, Vistana, Ray Ban, and Versace and so on. In fact, the brands listed here only account for a small portion of the amount. According to bestbuyeyeglasses.com, there are more than one hundred different brands only in the field of designer sunglasses. But as mentioned before, some of them are less well-known. For instance, brands including Adidas and Nike are more famous for their sports products such as shoes and cloths. Few people know they also produce designer spectacles. On the other hand, some brands exclusively provide eyewear products. The most famous ones contain Ray Ban, Gucci, Versace, Flexon, and Oakley etc. In addition, these exclusive eyeglass manufacturers usually cover different areas, including regular eyeglasses, prescription glasses and sunglasses.
In fact, those reputable brands are being operated by international corporations. They usually have branches in several continents. Furthermore, those companies often boast a long history of making eyewear products. All these advantages enable them to do business worldwide. Taking Ray Ban designer spectacles for an illustration, this brand was first developed by Bausch & Lomb in 1937 and then been sold to an Italian company named Luxottica Group in 1999. Currently, the Ray Ban Aviator is one of the most popular styles of sunglasses in the world. Until now, this brand has gained its stable status of being an influential international brand.
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/brands-of-designer-spectacles-1673447.html
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Both prescription and non-prescription eyeglasses are now manufactured by a variety of brands. A concerning phenomenon is that the proportion of visual impaired individuals is increasing. This is mainly caused by the fast daily lives in the modern time. Both students and workers are forced to spend more hours in studying or working every day. According to Mr. Bates’ theory, poor eyesight is mainly caused by eyestrain and stress. In this sense, excessive eye use resulted from learning and performing tasks can be perceived as a great contributor to visual deterioration or even impairment. A convincing example for this explanation is the rising amount of young individuals who need to rely on corrective eyeglasses or contact lenses. It is well recognized that modern children are being affected by visual problems at earlier ages than before. Even some preliminary students begin to wear prescription glasses.
It is very hard to change such a trend. For kids and young adults, the best way to “restore” normal vision is believed by visual professionals to be prescription spectacles. While it is nearly impossible to stop such an adverse phenomenon stated above, the good side is that prescription glasses now come in a huge range of different types. Both children’s and adults’ eyeglasses can be consisted of different frame materials, styles, as well as lens materials. In fact, it may be exactly the expanding demand for vision correction which gives eyewear manufacturers enough driven force and confidence to produce the colorful options of glasses. Given the unchangeable fact of visual problems affecting a large population, it is good news that there are so many choices of eyeglasses.
It is a must for the majority of eyeglass customers to take price into account. Regular eyeglass replacement during several decades can cost a large amount of money. If one person has some experience of buying eyeglasses, he or she will notice a fact that the price of eyeglass frame is separate from the price of lenses. Customers are entitled to the selection of eyeglass frames and lenses respectively. There are seldom eyeglass stores who sell whole pairs of eyeglasses. Most eyewear stores will combine the frame and lenses together chosen by a customer. In this case, it is necessary for glass buyers to consider cheap eyeglass frames. Even if sometimes they can only replace the old lenses with new ones, it is a necessity to replace an eyeglass frame which has been used for a couple of years. In most instances, eyeglass frames are much more expensive than lenses, which further urge customers to find cheap eyeglass frames.
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/necessary-to-consider-cheap-eyeglass-frames-1648488.html
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For those who always work in front of the computers, healthy eyes sound like something hard to get. Taking care of your eyes will benefit you for the rest of your life. Choose quality eyewear, including prescription glasses, reading glasses, and even eyeglasses frames. Here are some easy exercise for you to do, only taking a few minutes but very effective.
· Sit comfortably on a chair. Rub your hands together until they feel warm. Close your eyes and cover them lightly with your cupped palms. Avoid applying pressure on your eyeballs. Place your palms so that the nose remains uncovered, and the eyes remain behind the slight hollow of the palms. Make sure that no light rays enter the eyes, and leave no gaps between fingers or between the edge of the palms and the nose. You may still see other lingering traces of colors. Imagine deep blackness and focus on the blackness. Take deep breaths slowly and evenly, while thinking of some happy incident; or visualize a distant scene. After your eyes see nothing but blackness, remove your palms from your eyes. Repeat the palming for 3 minutes or more.
· Close your eyes tightly for 3-5 seconds, and then open them for 3-5 seconds. Repeat this 7 or 8 times.
· Close your eyes and massage them with circular movements of your fingers for 1-2 minutes. Make sure you press very lightly; otherwise, you could hurt your eyes.
· Press three fingers of each hand against your upper eyelids, and hold them there for 1-2 seconds, then release. Repeat 5 times.
· Sit and relax. Roll your eyes clockwise, then counter-clockwise. Repeat 5 times, and blink in between each time.
· Sit about 6 inches (150 mm) from the window. Make a mark on the glass at your eye level (a small sticker, black or red, would be perfect). Look through this mark and focus on something far away for 10-15 seconds; then focus on the mark again.
· Hold a pencil in front of you at arm’s length. Move your arm slowly to your nose, and follow the pencil with your eyes until you can keep it in focus. Repeat 10 times.
· Look in front of you at the opposite and pretend that you are writing with your eyes, without turning your head. It may seem difficult at first, but with a bit of practice it is really fun. The bigger the letters, the better the effect.
· Imagine that you are standing in front of a really big clock. Look at the middle of the clock. Then look at any hour mark, without turning your head. Look back at the center. Then look at another hour mark. Do this at least 12 times. You can also do this exercise with your eyes closed.
· Focus on a distant object (over 150 feet or 50 m away) for several seconds and slowly refocus your eyes on a nearby object (less than 30 feet or 10 m away) that’s in the same direction. Focus for several seconds and go back to the distant object. Do this 5 times.
· Focus on an object in the distance (as far as possible) with a low contrasting background. Do this for a few minutes every half hour or so. This does not improve your vision, nor does any other technique. It can, however, maintain your best eyesight level during the day and prevent significant further vision deterioration.
· Make up and down eye movements starting from up to to down. Do this 8 times. Then do the side to side eye movement, starting from left to right. Repeat this 8 times. Make sure not to add pressure to your eyes! It only worsen your vision!
Article Source:http://www.articlesbase.com/vision-articles/eye-exercise-tips-for-youtake-care-of-your-eyes-1627460.html