With the quick development of online optical shops, buying bifocal glasses from online optical stops becomes more and more easy. Different from the regular glasses which had convex lenses or concave lenses to help people see more clearly, bifocal glasses were invented by Benjamin Franklin that contained two kinds of lenses – [...]

Bifocal glasses Hide

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 [...]

Bifocal glasses Hide

When you first come across the title, you must be puzzled. Why do children need bifocal glasses? Aren’t they designed for middle-aged or aged persons? Please read the following parts to get why bifocal glasses for children are necessary.
Bifocal glasses are used to correct vision at two distances—a prescription on top for far away and [...]

Bifocal glasses Hide

Benjamin Franklin is only legally and universally recognized inventor, though many data has it that other people may be the first creators of bifocal spectacles. It matter little what the reality is, but the story about bifocal glasses and Benjamin Franklin is really very interesting. Here is the bifocal glasses history.
The first bifocal eyeglasses invented [...]

Bifocal glasses Hide

Bifocal glasses were first invented by Benjamin Franklin, one of the founders of the United States. He simply cut two pair of different prescription spectacles in half and combined them together for each eye. This is the fundamental principle of bifocal lenses, even though technological techniques have progressed significantly until now. With his creative design, [...]

Bifocal glasses Hide