Is Trifocals a Word?

having three foci. (of an eyeglass lens) having three portions, one for near, one for intermediate, and one for far vision. trifocals, eyeglasses with trifocal lenses.

Is there such a thing as trifocals?

Trifocals are eyeglasses with lenses that have three regions which correct for distance, intermediate (arm's length), and near vision. John Isaac Hawkins developed the trifocal lens in 1827. Trifocals are mostly used by people with advanced presbyopia who have been prescribed 2 diopters or more of reading addition.

Are progressives the same as trifocals?

Progressives are similar to trifocals, but they can provide a more seamless transition between vision ranges. The cost of trifocals compared to other types of eyeglasses varies, depending on the level of customization you are looking for and what special options, like lens coatings and frames, you select.