trifocals

Three-power vision aids

Trifocals are eyeglasses with lenses divided into three sections, each ground to a different focal length—typically for near, intermediate, and distance vision.

The design allows the wearer to see clearly at multiple distances without switching glasses: She got trifocals so she could read, use the computer, and drive with the same pair.

eyewear

spectacles

Corrective eyewear worn daily

glassesCorrective eyewear or tumblers
framesRigid enclosing structures
eyeglassesCorrective lenses worn

lenses · prescription · corrective · progressive · polycarbonate · anti-reflective · scratch-resistant · rimless · wire-frame · tortoiseshell

correction

presbyopia

Age-related near vision loss

astigmatismIrregular corneal curvature disorder
hyperopiaDifficulty seeing nearby objects
farsightednessBlurred near vision condition

reading · eyestrain · accommodation · diopter · refraction · ophthalmology · optometry · adjustment · segments · lined

aging

presbyopia

Age-related near vision loss

magnificationDegree of visual enlargement
elderlyAdvanced in age
seniorsOldest in a group

age-related · grandparents · retirement · mature · farsightedness · gerontology

Categories

visionsharp, eye, visual perception, sight, eyes
eyewearglasses, sunglasses, eyeglasses, spectacles, shades
eye careeye doctor, optometrist, ophthalmologist, eye exam, glasses
optical devicestelescope, lens, magnifying glass, binoculars, microscope
optometryeye exams, eye care, eye doctor, glasses, contact lenses
eyeglass lensesbifocal, progressive, progressive lenses, progressives, single vision

Opposites

lens complexity

trifocalsreaders

Those who peruse text

reading glasses · bifocals · progressive lenses · contact lenses

Family

Familiarity: Top 200,000
Profile: Used worldwide · Timeless · Concrete · Everyday, not technical · Rated G