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i do not need them but people who do need them because your eyes look 3 different ways down and side to side and they are for down so they help you see down.
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∙ 15y ago
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What is a sentence with the word bifocals in it?
Please help me find my 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.
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 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 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 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.
Where were bifocals invented?
bifocals were invented on the 300th block of Market street in Philadelphia
How many syllables does bifocals have?
The word "bifocals" has three syllables: bi-fo-cals.
What were bifocals made for?
Mostly for bank clerks .... Bifocals are glasses which have two focal points, one for near objects (reading) another for far away things. Older, "true" bifocals, have a separation line in the lens. New "varifocals" can habe more than 2 focal areas but need time to get used to ;-)
Who uses bifocals?
Bifocals are a type of prescription eyeglasses designed for people who need both near and farsighted vision correction. Different from single vision lenses, bifocals have two corrective lenses on each side of a pair of glasses, for a total of four lenses per pair.
Where and when were the bifocals invented?
ben Franklin invented his bifocals at his house in philly and made them on March 23.1784
