varifocal
Progressive vision correction
Varifocal describes lenses with a gradient of focal lengths, allowing clear vision at multiple distances—near, intermediate, and far.
Varifocal glasses eliminate the visible line found in bifocals, blending the transitions smoothly: It took me a week to adjust to my new varifocals.
The term applies to both eyeglasses and camera lenses with adjustable focal length.
Favoring reform and innovation
- trifocalLens with three focal lengths
- presbyopiaAge-related near vision loss
- eyeglassesCorrective lenses worn
- diopterUnit of focal power
prescription · optometrist · ophthalmology · refraction · astigmatism · myopia · hyperopia · frames
Light-focusing curved glass
- apertureAdjustable optical inlet
- zoomRapid movement or magnification
- opticalOf vision or light
- magnificationDegree of visual enlargement
curvature · refractive · power · accommodation · convergence · distortion · prism · coating
Self-adjusting lens clarity
- telephotoMagnifying camera lens
- wide-angleEncompassing broad vistas
- camcorderPortable video recording device
- DSLRMirror-reflex digital camera
progressive
Favoring reform and innovation
- trifocalLens with three focal lengths
- presbyopiaAge-related near vision loss
- eyeglassesCorrective lenses worn
diopter · prescription · optometrist · ophthalmology · refraction · astigmatism · myopia · hyperopia · frames · gradient
lens
Light-focusing curved glass
magnification · curvature · refractive · power · accommodation · convergence · distortion · prism · coating
autofocus
Self-adjusting lens clarity
- telephotoMagnifying camera lens
- wide-angleEncompassing broad vistas
- camcorderPortable video recording device
DSLR · mirrorless · macro