Fact File about the Invention of Bifocals: Invention: Bifocals *** Date of Invention:
1784 *** Name of Inventor:
Benjamin Franklin *** Lifespan of Inventor: 1706 - 1790 *** Nationality of Inventor: American *** Historical Period: First US Industrial Revolution (1700 - 1860) *** Country of Origin: America *** Facts about the Inventor,
Benjamin Franklin, and the invention of
Fact 1: Who invented Bifocals? The Bifocals was invented by Benjamin
Franklin in 1784 during the First US Industrial Revolution era of inventions
(1700 - 1860). He also invented the Franklin
stove and the
Fact 2: Who invented Bifocals? Prior to the invention of Bifocals in
1784, glass blowers produced "reading stones", a segment of a glass sphere that
could be laid against reading material to magnify letters. Roger Bacon then
invented spectacles (glasses) c.1267 to help people who suffered with poor
Fact 3: Who invented Bifocals? The first optical devices were
convex lenses that bulged outward in the middle and they were used to correct
Fact 4: Who invented Bifocals? Concave lenses for nearsightedness
(myopia) were invented by Nicholas of Cusa in 1451. The concave lenses were
thinner at the center and thicker at the ends.
Fact 5: Who invented Bifocals? The problem was that some people suffered
from both myopia (shortsightedness) and presbyopia (longsightedness) and had to
switch between pairs of glasses in order to read with one pair or to see distant
objects with the second pair of glasses.
Fact 6: Who invented Bifocals? The inventor of Bifocals, Benjamin
Franklin, was one of those people that suffered from both myopia (shortsightedness)
and presbyopia (longsightedness).
Fact 7: Who invented Bifocals? Benjamin Franklin, was born in Boston,
Massachusetts, on January 17, 1706 and died on April 17, 1790.
Fact 8: Who invented Bifocals? The early years of Benjamin Franklin were spent in Boston,
Massachusetts where he was raised by his family.
His parents names were Josiah Franklin and Abiah Folger Franklin and Ben was the
fifteenth of 17 children. Benjamin Franklin attended Boston Latin School for
only two years but became self-educated through reading.
Fact 9: Who invented Bifocals? His first job was at the age of just 10
years old when he worked in his father's candle shop. At the age of 12 years old
he was then apprenticed to his brother James who was a Boston printer. Working
at a printers Ben had access to numerous books and became extremely well read.
Fact 10: Who invented Bifocals? In 1726 Benjamin Franklin established his
own printing business and became a wealthy man. He had time to pursue his many
interests and in 1742 created his first major invention, the Franklin stove.
Fact 11: Who invented Bifocals? In 1743 Benjamin Franklin founded the
American Philosophical Society encouraging scientific men to discuss their
discoveries, inventions and theories.
Fact 12: Who invented Bifocals? Fascinated by new ideas Benjamin Franklin
invented the lightning rod conductor as part of his groundbreaking exploration
Fact 13: Who invented Bifocals? Benjamin Franklin retired from printing
in 1747 and began manufacturing some of his new inventions and became involved
in politics. It was an extremely volatile period in America that led to the
American Revolution (1775–1783). On July 4, 1776 Benjamin Franklin, one of the
56 delegates to the Continental Congress, signed the Declaration of
Fact 14: Who invented Bifocals? One year after the war ended Benjamin
Franklin invented the Bifocals. His eyesight had never been good and he had
trouble seeing both close up and far away. He suffered from both myopia (shortsightedness)
and presbyopia (longsightedness) and needed two pairs of glasses.
Fact 15: Who invented Bifocals? Benjamin Franklin found it
increasingly irritating to keep changing his glasses in order to see clearly.
This caused him particular annoyance when he was traveling when he sometimes
read but often wanted look at the views. He decided to make just one pair of
glasses that he could use for both close work and for distance.
Fact 16: Who invented Bifocals? In 1784 Benjamin Franklin arranged for
the lenses in his spectacles to be cut in half and each half were then fitted in
the same circle to make a new pair of glasses that were suitable for both
reading and for viewing distant objects. Benjamin Franklin called his invention
Fact 17: Who invented Bifocals? Benjamin Franklin reported in his
correspondence that "I wear my spectacles constantly, I have only to move my
eyes up or down, as I want to see distinctly far or near, the proper glass being
Fact 18: Who invented Bifocals? Benjamin Franklin had been appointed as
the first American Diplomat and as such traveled to France from 1776 to 1785.
Following his invention of Bifocals in 1784 he reported that they "serve me best
at table to see what I eat, not being the best to see the faces of those on the
other side of the table who speak to me ... a sight of the movements in the
features of him that speaks helps to explain, so that I understand French better
by the help of my spectacles".
Fact 19: Who invented Bifocals? The artist Charles Wilson Peale painted
Benjamin Franklin in 1785. The portrait is the only one showing Franklin wearing
double spectacles (split-lens bifocals).
Fact 20: Who invented Bifocals? Benjamin Franklin died on May 14, 1790 in
Philadelphia, at the age of 84. Approximately 20,000 people attended his funeral
to pay their respects to a Founding Father of the United States of
America, a great statesman and a famous inventor whose inventions included
Bifocals Fact File: Country of Origin:
United States *** Name of Inventor: Benjamin Franklin *** Nationality of
Inventor: American *** Date of Invention: 1784 *** Invention: Bifocals ***
Lifespan of Inventor: 1706 - 1790 *** Invention Era: First US Industrial
Revolution (1700 - 1860) *** The Inventor and Invention of Bifocals ***