I just tilt my head up a little to look through the middle lens of the trifocal.    From Wordnik.com.  [On Gun Sights and Eye Doctors] Reference

I also have a problem with my vision: I had to switch over to wearing trifocal glasses 2 years ago.    From Wordnik.com.  [silly newbie w/passport & transport needs camping companion] Reference

You know, spy stuff: agents skulking down hallways, high-tech situation rooms lined with monitors, and the trifocal night vision goggles that lend the Chaos Theory album cover its central image.    From Wordnik.com.  [Disquiet » Amon Tobin Video Game MP3] Reference

People who wear trifocal or progressive lenses often find that the middle-distance portion is too small to use the computer comfortably; they end up constantly moving their heads, and the screen can seem wavy or out of focus.    From Wordnik.com.  [Bifocals and Laptops] Reference

Only bifocal and trifocal lenses were available in the past.    From Wordnik.com.  [The Earth Times Online Newspaper] Reference

Progressive lenses are otherwise recognized as "no-line" bifocals, which are actually trifocal lenses with no visible lines.    From Wordnik.com.  [We Blog A Lot] Reference

The downside of trifocal lenses is limited continuity of vision and peripheral distortion greater than with bifocals or single vision lenses.    From Wordnik.com.  [GigaOM Network] Reference

A "do-all" solution is trifocal glasses with three lens planes combining an upper segment for distance vision, a lower/bottom one for close work, and a third one for mid-range or screen distance in between.    From Wordnik.com.  [GigaOM Network] Reference

A trifocal variant is occupational "readables" with a relatively larger center zone for mid-range computer distance and proportionately smaller lower and upper zones for reading/close work and focusing at about 10 feet for "room-type vision" respectively.    From Wordnik.com.  [GigaOM Network] Reference

It can be hard to find just the right glasses It is even harder when your optometrist tells you that you need to wear bifocals or trifocal eyeglasses It can be embarrassing because you can see a definitive line that goes across the lenses This tells everyone that you really cannot see There is an alternative that is available now These eyeglasses are called progressive eyeglasses and they are a much better option than the traditional bifocal or trifocal eyeglasses.    From Wordnik.com.  [We Blog A Lot] Reference