Prescription Glasses

Material of the frame is an important factor for the assessment of a pair of eyeglasses. Modern technologies used by eyewear manufacturers are granting eyeglass users with various frame materials. Metal eyeglass frames as the most original option now only account for one of the basic categories. There are also plastic eyeglass frames and even frames made of unusual materials such as wood, bone, buffalo horn, leather, precious stone and so on. In fact, these special materials are rarely used. Until now, metal frames and plastic frames are the main types, within each there are still many variations. In the history of eyeglasses development, plastic frames came later than metal ones. It is now widely said that plastic eyeglass frames are lighter and more durable than metal ones. With the invention of some superb plastics such as polycarbonate and high index ones, there are even more individuals who are advocating the extra benefits offered by those plastic frames. These folks have probably ignored the advances made in the world of metals used to produce eyeglass frames deliberately or unintentionally. The truth is that metal eyeglass frames have also made significant progress during the past decades. (more…)

It is estimated by the National Institute of Occupational Safety and Health that there are about 2,000 individuals in the United States suffering workplace eye injuries every day. Most of them are serious enough to require medical interference. This big concern causes safety eyeglasses to be a necessity for those involved workers. There can be flying debris striking an unprotected eye. And a worse case can be chemicals or liquids splashing the eyes. In addition, for individuals who have presbyopia, it is necessary to wear bifocal reading glasses in order to get convenient changes between near and distance vision. Superior to single vision reading glasses, bifocal reading glasses have maintained a large number of users during the past decades. The combination of the mentioned two groups of individuals has called for the invention of bifocal safety eyewear. These combinational eyeglasses can meet both of the two requirements, namely, eye protection and presbyopia correction. There are some important aspects associated with those bifocal safety glasses. Assessing possible frame materials, there are bifocal safety glasses metal frame and bifocal safety glasses zyl frame. As corrective eyewear, bifocal safety glasses still need to be made with personal prescription. (more…)

Nowadays, eyeglass frames can be made from many materials. They mainly include plastics, metals as well as unusual materials such wood, leather or even stone. Plastics used to produce eyeglass frames include zylonite, cellulose acetate propionate, nylon, CR-39, polycarbonate as well as high index variations. Factors that can be used to assess these materials contain hypo-allergenic, lightweight, strong, flexible, corrosion-resistant, as well as color options. Within the large category of metal frame eyeglasses, possible materials contain Monel, titanium, beta-titanium, beryllium, stainless steel, aluminum and some other alloys. In similar, the aforementioned factors are also widely used to compare one metal with another. Along with the pervasive availability of lens options, there are actually many styles of eyeglasses for customers to choose from. But it seems that scientists are still making restless efforts in developing more materials for different industries including the eyewear industry. This trend has been testified by the creation of new forms of plastics such as polycarbonate and high index ones. Furthermore, it can also get proof from the wide collection of alloys that are being used in many fields. Memory metal eyeglasses are a perfect example. (more…)