subject: A Brief Introduction On The History Of Bifocal Glasses [print this page] In the movie "Mission Impossible", Tom Cruise used a series of high-tech glasses to transmit images and display secret information. Now, similar millions of high-tech glasses will bring visually help to people who suffer from vision problems. U.S. scientists have developed a liquid crystal optical zoom. Simple adjusting the knob on the frame can change the focal length to obtain a better than normal vision. Scientists predict that this technology will open the door to development of intelligent glasses.
These high-tech glasses have many similarities in the original bifocal glasses even though their many functions can be unmatchable. When it comes to these bifocal glasses, many people are familiar with them. But they may also dont know the history of bifocal glasses. In 1784, American scientist, Ben Franklin invented the first pair of bifocal glasses. As he suffered from both myopia and presbyopia for long time, it was not convenient to change eyeglasses between two pairs. Based on the idea, he finally invented bifocal glasses. Therefore, these glasses are also called Benjamin Franklin glasses.
And the eyeglasses frames of these bifocal glasses have evolved during the past years. At earlier time, oculars were kept in ones hand and now they are worn by people. It is because that Savonarola has changed them. And the fashionable bifocal reading glasses are created by Edward Scarlett. These bifocal glasses are more stylish since the eighteenth and early nineteenth century.
Although contact lenses are becoming more and more popular in these days and there are some advanced medical technology to cure vision problems, bifocal glasses are still favored by millions of people. It is easy to buy these glasses from optical stores. Of course, we still need more time to know about the history of bifocal glasses.
