In his house in Philly because he got tiered of taking off and putting back on his glasses when he wanted to read. So he got 2 lenses and set his mind to work!
ben franklin invented the Bifocals in his house
bifocal glasses
Benjamin Franklin
No, Benjamin Franklin did not invent the ocular device. While Franklin did invent many things, such as the lightning rod and bifocal glasses, he did not invent the ocular device.
Benjamin Franklin had very bad vision and could not read very well so he needed something so that he could see better that why he made bifocals
Ben Franklin was the first to do many things. For instance, he was the first to invent the Franklin Stove, the swim fins, the bifocal lenses, and the glass armonica, along with many other useful inventions.
Benjamin Franklin did.
1784
Lightning rod, Franklin stove, and bifocal glasses.
He invented bifocal glasses.
bifocal glasses
Benjamin Franklin
Franklin did.
Benjamin Franklin.
No, Benjamin Franklin did not invent the ocular device. While Franklin did invent many things, such as the lightning rod and bifocal glasses, he did not invent the ocular device.
what year did Benjamine invent electricity 1706
Benjamin Franklin had very bad vision and could not read very well so he needed something so that he could see better that why he made bifocals
in his bedroom