August Morck Jr. patents a bifocal cemented on the outside of the original lens
The first formal school for refracting is organized in Boston - The Klein School of Optics, which later became the New England College of Optometry
1730 - Early 20th Century
During most of this period, eyeglass frames were individually handmade and newer models appeared in quick succession. The guidelines below represent the period of common use of these design elements, however they are not all-inclusive. Much remains unanswered so this should only be used as a guide. It is based on personal experience as well as reflecting much of the current literature. Additional ideas and comments are welcomed.
Realize that all pre-1730 spectacles had round frames with a bow or C bridge, no sidearms, and therefore no finials.
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