multifocals

multifocals

(ˌmʌltɪˈfəʊkəlz)
pl n
(Medicine) multifocal spectacles
References in periodicals archive ?
Studies have suggested that older adults who wear multifocals (bifocals or trifocals) may be at higher risk of falls, particularly when they first start wearing them.
Before multifocals, monovision worked very well for 50 years or more, but it created compromises in vision that some people could never get used to," Gordon said.
This patented manufacturing process will help provide the most advanced lenses possible, including multifocals and PALs.
Diffractive multifocals use the Huygen-Fresnel principle whereby eschelets on the IOL surface act as a diffraction grating creating different foci through constructive and deconstructive interference of incident light.
com - which does not sell any products - contains many pages of advice for eyewear buyers, including information on fashion trends, frame materials, frame quality, lens designs, lens materials, lens coatings, ultra-thin lenses, bifocals and multifocals, photochromics and tints, selecting eyeglasses for children, and more.
Single vision lenses improve all these factors in adaptive multifocal wearers but as Professor Elliott explained, it's not as simple as changing all multifocal wearers to single vision to eradicate falls: some inactive people do fall less in multifocals as their reaction time can be better (for instance in order to grab a handrail), whereas fit, active people fall less in single vision lenses.
I would encourage practitioners to take people through their options and give them the chance to say if they want to spend money, or to go through health insurance to choose multifocals over single vision lenses," she said.
Other lens types that utilise simultaneous images for the relief of presbyopia include rigid gas permeable (RGP), hybrid multifocals (RGP surrounded by a soft "skirt") and sclerals.
Kicking off proceedings, Karl Aberdeen, CooperVision's UK and Ireland professional relations manager, promised delegates that their view of multifocals 'would change' following the afternoon's proceedings.
Silicone hydrogel lenses which have less water to lose can be used for monovision and now for multifocals which broadens the options.
from Norville is designed to replace lined multifocals and to restore the intermediate vision which bifocal wearers have found missing.
The next meeting for the Scottish Contact Lens Society will take place on May 12 with Glen Ward from Mark'ennow speaking on toric multifocals.

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