Trifocal

Trifocal

Corrective eyewear lenses containing regions with three distinct optical powers. The three standard regions are distance at the top, intermediate in the middle and reading towards the bottom of the lens.

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Part of Speech: noun
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Industry/Domain: Eyewear
Category: Glasses
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Related terms

trifocal

Health care; Optometry

A lens design that has three focal areas: a lens for close work or reading, a lens for mid-distance viewing or arm's length, and a lens for faraway viewing or driving.

trifocal

Eyewear; Glasses

Corrective eyewear lenses containing regions with three distinct optical powers. The three standard regions are distance at the top, intermediate in the middle and reading towards ...

trifocals

Eyewear; Optometry; Contact lenses; Eye surgery

Corrective lenses that have three powers of correction. Typically the majority of the lens is corrected for distance vision while a small area is corrected for near vision and ...

trifocal

Eyewear; Optometry

A lens design that has three focal areas: a lens for close work or reading, a lens for mid-distance viewing or arm's length, and a lens for faraway viewing or driving.

trifocal lens

Eyewear; Optometry

Multifocal lens having three portions, usually for distance, intermediate and near vision.

trifocal lenses

Eyewear; Contact lenses

Lenses prescribed for those who need correction for three fields of vision: far away, up-close and intermediate.

Project Glass

Eyewear; Glasses

Project Glass is a research and development program by Google to prototype and build an augmented reality head-mounted display (HMD). While the idea is not new, the project has ...

adjustable glasses

Eyewear; Glasses

Recently in the news for the consumer market, adjustable glasses have also been featured as a method of alleviating difficulties and increasing productivity for people in ...

harry potter glasses

Eyewear; Glasses

A thick, round glasses seen in the eponymous character in J.K. Rowling's Harry Potter series.

pupillary distance (PD)

Eyewear; Glasses

The distance (measured in mm) between the center of your pupils of your eyes when looking far away in the distance. If the prescription lenses are not set at the same distance as ...

round-seg bifocal

Eyewear; Glasses

Uses a round reading section for the bifocal lens that is put on the back of the lens rather than the front, putting the lens closer to the eye for an expanded reading area.

scratch resistant coating

Eyewear; Glasses

A coating that makes lenses less prone to scratching.

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