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Benjamin Franklin cut one pair of far-seeing glasses and one pair of close-up-seeing glasses and put half-and-half of both pairs together.
What else can I help you with?
What is the bifocals patent number?
Bifocal lenses as a concept were not patented; there are dozens of patents related to bifocals, bifocal contacts, and processes to make bifocals.
What is a sentence with the word bifocals in it?
Please help me find my bifocals.
Why are bifocals important?
because bifocals are still used today and without bifocals you would have to have 2 pairs of glasses that's why its Important
What did benjamen invent?
* lightning rod * Franklin stove * odometer * bifocals* lightning rod * Franklin stove * odometer * bifocals* lightning rod * Franklin stove * odometer * bifocals* lightning rod * Franklin stove * odometer * bifocals* lightning rod * Franklin stove * odometer * bifocals* lightning rod * Franklin stove * odometer * bifocals
What are some changes of bifocals?
bifocals changed in size, shape, and magnification.
What are glasses that can focus at two different lengths called?
Bifocals.
What is a sentence using the word bifocals?
The bifocals he bought were used. The lower lenses on my bifocals allow me to read more easily.
How many syllables does bifocals have?
The word bifocals has three syllables. (bi-fo-cals)
Why did Benjamin Franklin make bifocals?
So that he would only have to carry one pair of glasses.
Is it a bad idea to play golf wearing bifocals?
It is probably not a bad idea to play golf wearing bifocals but it might make it hard for you to focus on the ball. It could also cause you to have less balance when you are hitting the ball.
What do progressive bifocals cost?
There are different types of bifocals and different sizes so there are different costs.
Has the bifocals saved lives?
The bifocals haved saved lives by letting people see clearly.
