Bifocal is having two focal lengths - one corrects close up vision (such as for reading), the other is for distant vision (such as for driving, watching tv).
Please help me find my bifocals.
The word bifocals has three syllables. (bi-fo-cals)
The bifocals he bought were used. The lower lenses on my bifocals allow me to read more easily.
Bifocals
Knock Knock. tigger nits
because bifocals are still used today and without bifocals you would have to have 2 pairs of glasses that's why its Important
bifocals changed in size, shape, and magnification.
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* lightning rod * Franklin stove * odometer * bifocals
Bifocal lenses as a concept were not patented; there are dozens of patents related to bifocals, bifocal contacts, and processes to make bifocals.
There are different types of bifocals and different sizes so there are different costs.
The bifocals haved saved lives by letting people see clearly.