Optician more important and dignified. Far-sighted or aging colonial Americans imported spectacles from Europe. Spectacles were primarily for the affluent and literate colonists, who required a valuable and precious appliance. Benjamin Franklin in the 1780s developed the bifocal. Bifocal lenses advanced little in the first half of the 19th century. The terms bifocal and trifocal were introduced in London by John Isaac Hawkins, whose trifocals were patented in 1827. In 1884 B. M. Hanna was granted patents on two forms of bifocals which become commercially standardized as the "cemented" and "perfection" bifocals. Both had the serious faults of ugly appearance, fragility,
The Spectacles, Western Australia and boardwalks in this area. The Spectacles, Western Australia The Spectacles is a mixed-use suburb of Perth, the state capital of Western Australia, located in the City of Kwinana. It comprises almost entirely a wetland reserve surrounded by degraded native bushland. A small number of residential housing properties lie in the south-eastern corner of the suburb. The Spectacles wetland area is considered to be the most valuable asset of Kwinana's natural environment, covering 3.7 square kilometres. It is named The Spectacles because it comprises two lakes connected by a drain, giving it the appearance of a pair of spectacles from