trifocals


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Related to trifocals: Bifocals, Progressive lenses

trifocals

/tri·fo·cals/ (tri´fo-k'lz) trifocal glasses.
References in periodicals archive ?
Multiple-focal lenses, such as bi- and trifocals, can create problems with depth-perception and send you hurtling toward the pavement.
I am 55-years old, Wear trifocals, am blind in one eye and can't see out of the other and can consistently make 3" groups at 100 yards with open sights.
If you wear bifocals or trifocals, your monitor probably should be considerably lower than usual positions.
Even lenses that do correct the intermediate zone, such as trifocals and progressive lenses, have only a small portion for the intermediate area--not nearly Large enough for comfortable computer work.
I wear trifocals and have trouble focusing (peep, pin, target), actually seeing double pins sometimes.
I wear blended trifocals and do not have any problems focusing on my pins.
The study glasses could be worn over the participant's prescription eyeglasses and use of bifocals or trifocals did not appear to interfere with the use of the VCS.
plans to create a commercial version of the electrically adjusted eyeglasses to market to presbyopic people, who typically wear bifocals, trifocals, or graded lenses.
If you are wearing trifocals, you may remember Frederick Herzberg's theory of motivator versus satisfier attributes and Douglas McGregor's Theory X and Theory Y.
I left my computer glasses with the optometrist over the weekend to get the new lens and suddenly rediscovered what an ordeal it was to use a computer while wearing trifocals.