Eye Care Blog

Points of Men's Choice of Bifocal Glasses for Golf

Added 26/5/2010

When it comes to differences between men and women, the choices of eyeglasses can be good argument. Women wear eyeglasses, nevertheless, because they get eye problems, but they would also pay so much attention on frame style or fashion elements. When this question is put in front of men,most possibly, they would inquire vendor for a pair ofbifocal glasses for golf .However, these criteria never suggest that men's eyeglasses are designed with no fashionable elements. There are still some stylish or preferable models of eyeglass frames for men. In other words, it is a wise decision to wear different spectacles under specific circumstances. But in general, eyeglass frames for men are becoming more masculine. At the same time, new modern twist is being added into these frames. There are some lasting trends in fashionable men's eyeglass frames.

Among the variety of eyeglass frame materials, titanium has never lost its popularity. This advantageous material is also widely used in golf clubs, bicycles and space shuttles. Titanium eyeglass frames rate high in both the function and fashion categories. They feature super lightweight, non-corrosive and very durable. Except for titanium, stainless steel and aluminum are also preferable for men.

Rimless and semi-rimless eyeglass frames for men have been popular during the recent years. These two styles have something in common. They are designed in a similar way that the lenses are held in place to the temples by a screw or a wire. In other words, the lens frame is minimized. Most men wear rimless or semi-rimless eyeglasses because of their modern or minimalist look. This advantage will be even magnified if these frames are combined with anti-reflective lenses. This combination is thought to make the glasses practically disappear. Another valuable benefit offered by rimless or semi-rimless eyeglasses for men is lightweight. Most men like these frame styles because they reduce the weight of a whole pair of eyeglasses.

Many larger and bolder eyeglass frames are available now. These extraordinary eyeglasses are really reasonable for their existence. They not only offer another special choice, but also flatter those male eyeglass users with larger body shapes. In particular, those biggest men's eyeglass styles suit better with individuals who have large eyes and head. Masculine styles including Aviator glasses are such a good example. Meanwhile, these large frames were never meant to replace the small, John Lennon glasses. The latter type will continue to go well with men with smaller faces.

Men are tend to focus their attention on materials of frames rather than fashion designs of bifocal glasses for golf. They choose bifocals with light material and good performance in sport.

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Information About Bifocal Lenses From Bifocal Lenses Wiki

Added 26/5/2010

There are many many advertisements about bifocal lenses, which makes customers confused and don’t know whether they are true or not. If you are still hesitating over whether to buy bifocal lenses or not, you should read this piece of information frombifocal lenses wiki. This is not an advertisement, but a free online encyclopaedia.

There are several aspects about bifocal lenses here:

  1. Definition

Bifocals are eyeglasses with two distinct optical powers. Bifocals are most commonly prescribed to people with presbyopia who also require a correction for myopia, hyperopia, and/or astigmatism.

  1. Construction

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[citation needed] 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. The most popular[citation needed] is the D-segment, 28 mm wide. While the D-segment bifocal offers superior optics, an increasing number of people opt for progressive bifocal lenses.

  1. History

Benjamin Franklin is generally credited with the invention of bifocals. However, serious historians have from time to time produced evidence to suggest that others may have preceded him in the invention. Historical articles includes correspondence from George Whatley, a London philanthropist, and John Fenno, editor of The Gazette of the United States, which convincingly documents that Franklin invented bifocals, perhaps 50 years earlier than has been generally thought.

Since many inventions are developed independently by more than one person, it is possible that the invention of bifocals may have been such a case. Nonetheless, Benjamin Franklin is certainly among the first to wear bifocal lenses, and Franklin's letters of correspondence suggest that he invented them independently, regardless of whether or not he is the first to invent them.

John Isaac Hawkins, the inventor of trifocal lenses, coined the term bifocals in 1824 and credited Dr. Franklin.

4. Future

Research continues in an attempt to eliminate the limited field of vision in current bifocals. New materials and technologies may provide a method which can selectively adjust the optical power of a lens. Researchers have constructed such a lens using a liquid crystal layer sandwiched between two glass substrates.

5. Problems

Bifocals can cause headaches and even dizziness in some users. Acclimation to the small field of view offered by the reading segment of bifocals can take some time, as the user learns to move either the head or the reading material rather than the eyes. Computer monitors are generally placed directly in front of users and can lead to muscle fatigue due to the unusual angle and constant movement of the head. This trouble is mitigated by the use of trifocal lenses or by the use of monofocal lenses for computer use.

Bifocal lenses wiki is a relative comprehensive and a very credible resource for you to know bifocal lenses. You can judge by yourself whether you need bifocal lenses or not.

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Why Are They Called “Benjamin Franklin Bifocal Spectacles”?

Added 25/5/2010

Bifocal spectacles, which are used to correct both near-sightedness and far-sightedness, are sometimes called “Benjamin Franklin bifocal spectacles”. Why?

The reason is very simple. Because it is Benjamin Franklin who invented bifocal spectacles.

As one of the most respectable state men in the history of US, Benjamin Franklin has also made many achievements in other fields. Of which, Bifocal spectacles are very typical.

As one of the most creative men in the world, Franklin has found the best way and embedded the two lenses in the same frame successfully. With the new glasses, he thinks now that there are two different focuses on each lens, they should be called bifocal spectacles.

Compared to other glasses, bifocal spectacles are much younger with a very short history, less than two and a half century up to now. They do not come into being till 1784 when Benjamin Franklin spends more time in reading.

During that time, he becomes older and gradually looses his vision, just because of presbypia and other eye problems probably. He has to replace the glasses for farsighted vision when he wants to look afar; and he has also to replace glasses for nearby vision when he reads. This is very boring and inconvenient. Therefore, he wants to change such situation- whether the two lenses, one most convex lens and another least convex lens, can be placed into the same frame.

However, the first bifocal eyeglasses invented by Benjamin Franklin are totally different from what people can now see. Generally, for each pair of glasses, there are four lenses. That’s to say, he has used two wholesome lenses on each side of the frame for one eye. Therefore, it can easily explain why the early bifocal spectacles are very heavy to wear and funny to see. And such situation dose not change until the 20th century when more people have to wear glasses and great achievements are scored in the industry. Those modern bifocal eyeglasses are combined by two half-cut lenses. And now, more and more innovations are made in bifocal glasses. This is what Benjamin Franklin has never thought of.

Though today’s bifocal spectacles are different with those invented by Benjamin Franklin, they are still sometimes called “Benjamin Franklin bifocal spectacles”. Because it is him stimulated the idea of two lenses integrated in one pair of glasses.

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