0
bifocals are glass lens that you place upon your nose & push up. they help you see better & / read
Wiki User
∙ 14y ago
Wiki User
∙ 11y agoA bifocal (bi means two) is a lens that has two different prescriptions cut in it.
Add your answer:
Earn +20 pts
Inventor of bifocal glasses?
Benjamin Franklin
Who invent the bifocal lens?
Benjamin Franklin did.
Can you change the bifocal prescription on glasses without changing the lens?
No, you cannot change the bifocal prescription on glasses without changing the lens. The lens is what is prescribed by your eye doctor. The frame, however, can be changed.
How did bifocal got its name?
Two focal lengths in one lens.
What would you use to study organisms in a drop of water?
a bifocal lens
What is the defernition for bifocal?
Bifocal is a type of corrective lens. Bifocal lenses are divided into two sections, usually the top for seeing far away objects and the bottom for seeing nearby objects.
What does add hi low med mean in contact lenses?
It means you are using a bifocal contact lens that has a bifocal power of about +1.25 to +1.50. A high add would have the bifocal power of about +2.50.
Root word in bifocal?
The root word in bifocal is "focal," which refers to the point at which light rays converge after passing through a lens. The prefix "bi-" in bifocal means two, indicating that bifocals have two distinct areas for different vision correction needs.
How do you use bifocals and television in a sentence?
I used my bifocals to watch the television
What tool do scientist use to look at insects?
a bifocal (using both eyes) disecting microscope. probably with zoom lens
Which word starts with bi and means having 2 eyepieces?
Bifocal
Can a person have both myopia and hypermetropia?
it is possible for a person to have both myopia and hypermetropia(hyperopia).The defect can be corrected by using bifocal lens.
