Evolution of the Bifocals

The American gentleman of scientific discipline, Benjamin Franklin, who endured both nearsightedness as well as presbyopia, invented bifocal reading glasses in 1784 to avoid having to frequently switch between 2 pairs of glasses.

The first lenses intended for rectifying astigmia were distributed by the British astronomy expert George Airy within the year 1825.

In the history of bifocal reading glasses, the building of eyeglass frames also evolved. Early on oculars were designed to be either kept in place with your hand or by maintaining force on the nose. Girolamo Savonarola advised that oculars could be held in place with a ribbon placed over a person’s head, which in turn was held secure by the weight of a hat.

Entering modern bifocal history, the contemporary fashion of bifocal reading glasses supported by temples passing over the ears, was produced in 1727 by the British lens maker Edward Scarlett. These designs were not at once prosperous, however, and assorted styles with attached handles like “scissors-glasses” and lorgnettes stayed fashionable throughout the eighteenth and into the early nineteenth century.

In the early 20th century, Moritz von Rohr at Zeiss made the Zeiss Punktal spherical point-focus lens system which dominated the eyeglass lens field for several years.

Despite the improving fame of contacts and laser restorative eye surgery, spectacles remain quite common, as their engineering has continued to improve. For example, it’s currently possible to buy frames constituted of special memory metal alloys that return to their correct configuration after being bent. Other frames have spring-loaded hinges.

Glasses have come a long way, haven’t they? In fact, today you can even buy rimless eyeglasses.

Many of these modern contraptions are also distinctly better capable of resisting the rigors of everyday wear and tear and the periodic accident. Contemporary frames are likewise frequently constructed from solid, light-weight materials like titanium alloys that weren’t available in earlier times.

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