Trifocal lenses offer correction for near and far vision, but also enable a person to see clearly at an intermediate level (about the length of your arm). Trifocals help correct the intermediate zone by featuring a second small lens segment directly above the area used to correct near vision.

What is the purpose of trifocals?

Bifocal glasses correct two types of vision, near and far. Trifocal glasses also include vision correction for intermediate distances, such as when you look at a computer screen.

Are trifocals necessary?

Trifocals are typically recommended for people over the age of 40 who have a pre-existing vision condition and are starting to experience presbyopia. But anyone who needs help with the three fields of vision could benefit from trifocal glasses.