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 ?
Standard executive or E-line trifocals have an intermediate negment depth of 7mm.
A new "fourth zone" of far intermediate is now available for the flat top bifocal and trifocal wearer and atLast
Glasses: frequency/ % covered Every 12 or 24 months-single vision, lined bi focals & lined trifocals all covered in full after any applicable co- pay (in-network only) Contacts: frequency/% covered Every 12 months -annual allowance of $120-150 Laser vision correction No benefits Vision Benefits of America 800-432-4955 x205 | www.
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.