What do bifocal glasses mean?

[Lacey Glasses]

I got confused on bifocal glasses and bifocal lenses, what do bifocal mean?

[Nadia Glasses]

Bifocal is an adjective, it has two meaning:

1. Having one section that corrects for distant vision and another that corrects for near vision

2. Having two focal lengths.

I think bifocal glasses means eyeglasses with bifocal lenses.

Note: bifocals is a nown, it means bifocal lenses.

[Gabriella Glasses]

Bifocals are eyeglasses whose corrective lenses each contain regions with two distinct optical powers. Bifocals are most commonly prescribed to people with presbyopia who also require a correction for myopia, hypermetropia, and/or astigmatism. Now, most online glasses shops offer regular bfocals and progressive bifocals, and it is very easy to buy bifocals eyeglasses online.