daianna's blog

Since the first glasses were invented, there was little change in this field. It was untill the 20^th cuntury that revolutionary changes were taken place in the glasses industry. So glasses produced before the time dividion are callled traditional glasses, those after it are called mordern glasses.Generally speaking, modern glasses are much advanced than those traditional ones, except in styles

Price should be one factor to be considered while comparing the two groups. Before the industrialization in glass field, eye wear are handmade only for those noble and rich people- eye wear in then time are luxury accessories. Later, as technology and techniques in the field matures on and on, the cost to make eye wear reduce all the more. For instance, some of nowadays modern eyeglasses can be purchased at several dollars.

Modern glasses are much lighter and durable than those traditional eye wear. Eye wear in the past are inconvenient to use, for they are mainly made with glass and metal, which are heavy in weight. Whats worse, glass is such a fragile material that may break into pieces easily under impact; metal will also deform easily in the mean time. On the contrary, such defects can never be found on modern eye wear. They are made from light weight and durable materials. For example, the lenses can be made from plastic, like CR39, a kind of very lightweight material; if the prescription becomes stronger on and on, high index lenses are also available- thick and heavy glass lenses are no longer needed. The frames can also be made from memory materials, like titanium, memory plastic, which can rebound to their original shapes after being twisted and bended.

More fashionable elements can be found on modern glasses than on traditional eye wear. When it comes to the 20th century, people begin to pay more attention to more than functionality that is what traditional glasses are mainly used for. And fashionable and personal elements are attached great importance since that period by both wearers and manufacturers. And now, many people tend to use eyeglasses as something of decoration, though many people are still in need of vision correction. One of such good example is the popularity of non prescription eyeglasses. These eye wear are specially designed for people who have no vision errors, but want to be as attractive and cool as those glasses wearers. To be simple, functionality is the main feature of traditional eye wear; fashionable and personal elements are now the main features on modern eye wear.

Mordern glasses have many advantages over traditional glasses. So people in the past refused to wear glasses. But today, people treat glasses as a fashionable accessory.