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Summary:

I’ve finally got computer glasses, after years of gradually increasing difficulty focusing at mid-range between distance and close-up vision. My optometrist first suggested bifocals back in ’02, but I resisted. In hindsight, this was not my wisest decision. My reasoning wasn’t vanity; I was getting along […]

I’ve finally got computer glasses, after years of gradually increasing difficulty focusing at mid-range between distance and close-up vision. My optometrist first suggested bifocals back in ’02, but I resisted. In hindsight, this was not my wisest decision. My reasoning wasn’t vanity; I was getting along reasonably happily with single vision lenses, and didn’t want to complicate my life.

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However, difficulty reading my computer screen went critical last spring when I downsized from a 17″ PowerBook to a 13″ unibody MacBook. I love the MacBook’s bright, sharp LED backlit display, but it’s smaller both in resolution and physical dimensions than my old machine. Happily, the computer glasses make reading the new display easier, clearer and more squint- and strain-free than the 17″ display with my old glasses. As expected, I find it tedious to have to switch spectacles when I’m not at the computer or reading, but having just turned 58, I guess making some concession to age is inevitable.

Computer Glasses

Computer glasses have prescription lenses allowing you to focus without strain on a computer screen, which is farther away than you would normally hold reading material (or should be, anyway — at least 20 to 26 inches from the user’s eyes is the standard recommended distance). A “task-specific” analog would be piano glasses for musicians. Regular bifocals aren’t really that helpful for computer work, although some folks find the transition area between reading and distance views with progressive bifocals provides some mid-range support that works for them. My new lenses are bifocals, but with only mid-range in the upper plane with the lower part of the lens for regular reading and other close work (a variant known as “occupational bifocal”), so I still need single vision regular glasses for distance work — watching TV, driving and just normal seeing.

Another option is single-vision mid-range lenses — pure “computer glasses,” but eyeglass-wearers will need another pair of specs., since both distant objects and reading materials closer than the computer screen will be blurred.

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. The downside of trifocal lenses is limited continuity of vision and peripheral distortion greater than with bifocals or single vision lenses. 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. However, “readables” are not intended for driving and such because they don’t support true distance focus.

With multi-focal lenses there’s also the choice between Progressive Addition Lenses (PAL) which eliminate the hard lines between the two or three segments, or conventional multifocals with lines. I like clear distinctions so went with regular lined bifocals, but that’s personal preference. Your eye specialist (optometrist or ophthalmologist) can consult and advise on which is best for you. My optometrist uses single vision computer glasses himself.

By around age forty or so, ability to focus on close objects begins diminishing (a phenomenon known clinically as “presbyopia”). Most forty-plus folks require vision correction for reading or performing other near tasks. I fudged it for 18 years after that using a “poor man’s bifocals” mode: holding reading materials close and peering over the top of my distance lenses.

Even younger users who spend a lot of time in front of computer screens may find greater comfort and fewer eyestrain issues by wearing computer glasses for screen viewing. Reportedly, growing evidence indicates that the stress focusing on mid-range or near objects over long periods can induce an effect “accommodative spasms” which may in turn result in increased or premature short-sightedness. Wearing computer glasses decreases accommodative effort and can help prevent or delay vision deterioration.

Computer Vision Syndrome

The growing number of people having trouble in this context is large enough that a new category of visual disorder called “computer vision syndrome” (CVS) has been described referring to computer-related vision problems, replacing the vaguer “eyestrain.” The most common CVS symptoms include headaches, visual focusing difficulties, burning, tired, aching, or dry eyes, double or blurred vision, light sensitivity, and neck and shoulder pain.

Aside from visual correction, other strategies that can help minimize and alleviate CVS include lowering light levels in computer workstation environments; getting anti-reflective and or Ultraviolet (UV) coatings on eyeglass lenses to reduce fatiguing glare and blue component light; and taking regular breaks from staring at the screen. Lens tints provide enhanced comfort for some users, although I don’t like them personally. Workplace environmental humidity can play a role as well.

Having a proper chair at correct height to support ergonomic posture with back straight and shoulders back, and using a laptop stand with an external keyboard and pointing device when working with portable machines at your desk to elevate the display to a higher viewing level help minimize eye and neck strain. Getting a bigger monitor can be beneficial too, even for laptops pulling desktop substitute duty, and monitors should be situated directly in front of the user — not at an angle or off to one side, at roughly arm’s length from your eyes.

One inhibition to getting computer glasses may be cost, especially in this recession. Prescription eyeglasses acquired through tradition channels tend to be expensive, but there are alternatives. I got my new specs from Goggles4U.com. They have nice light titanium frames, anti-scratch and UV coatings and prescription lenses, all for the grand total of $63.99 delivered to my door here in Nova Scotia, arriving from Pakistan in a charmingly hand-stitched and addressed cloth bag with wax seals, and including a hard case, cleaning cloth, and a handy-dandy little screwdriver tool for maintenance.

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Do you suffer with Computer Vision Syndrome? Have you tried computer glasses?

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By Charles Moore

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  1. I went the computer glasses route a few years ago (I’m 51). I got tired of looking through my bifocals and never really seeing the screen well. At the end of the day, my neck hurt (from tilting my head in a awkward angle) and my eyes were just tired. I can’t imagine going back to my regular glasses now. And by the way—if you haven’t upgraded from a CRT screen to LCD, that also makes a big difference in preventing eye strain.

    1. I always assumed that CRTs were better than LCDs. Working in graphics I found that the so called ‘raster burn’ was exerted more on liquid displays rather than the conventional tubes. Also LED displays tend to present colors more vividly (contrasted), asserting the strain on your eyes.

    2. where did you get your computer glasses? And are the lenses still bifocalized w/ computer range and reading range? Because that design seems like it will still lead to sore neck syndrome.
      rd

  2. My major issue with bifocals — I have exclusively worn progressive or no-line bifocal glasses and contacts — while working on a computer is having to use the typewriter method of pointing the nose at what you want to see or read. This is especially tiresome while evaluating a photo shoot and a few hundred full screen pictures.

    I finally convinced my optometrist to prescribe progressive bifocals used specifically for computer work, another pair of progressive bifocals for everyday use, and a pair of progressive contacts as an alternative to glasses and with a single-vision prescription to work on the computer while wearing contacts.

    My computer glasses, which are Nikon lenses specifically designed for computer use, have so far proved far superior to any other solution previously used. I would heartily recommend that anyone who uses bifocals investigate using a prescription and lenses designed for computer use. I, for one, will never go back to one pair of bifocals for everything.

  3. Harleigh Kyson Jr. Wednesday, October 21, 2009

    I find I can get along quite well with ordinary bifocals.

    I like being able to enlarge print on my screen with control-pluses (control-zero will restore the screen to its default size).

    Harleigh Kyson Jr.

    1. Thank you, Harleigh, for the tip about the control +. It works!!! I never knew that. If I had I might not be going back for new glasses next week.

      Much appreciated.

      1. Besides using control pluses to enlarge the screen, you can also use control minuses to reduce it in size. As I said before, you can use control-zero to go back to the original or default size of the screen presentation.

        Harleigh Kyson Jr.

  4. Frank Broughton Wednesday, October 21, 2009

    Thanks for the tip. My eyes are getting very bad and I need to do something. I just hate wearing the things – they drive me crazy at times, so for years I put off wearing any. Now I have to get some. Computer glasses sound like the deal for me.

  5. Thank you, thank you! I’m a 61-year-old blogger with trifocals. Getting my eyeballs to look through the middle lense at the computer screen has become more and more difficult. And my present glasses cost about $300! I will try the source from Pakistan. (A little guilt about patronizing the global economy. Pretty soon we’ll have no work at all left here in North America. But I’m poor and I gotta survive.)

  6. Interesting. I need reading glasses but never really stopped to think that I am further away from the computer screen than I would be reading a book.
    http://doctorbeatnik.wordpress.com/

  7. I do pretty well with regular progressive lenses – occasionally I have trouble with a lot of back and forth from page to screen but correct positioning of the printed material seems to help. Glasses do take some getting used to but mine are very comfortable – most of the time I don’t remember I have them on and have even stepped into the shower and turned on the water before I realized I still had them on! Or maybe that’s just another symptom of “aging”… hmmm. North Coast Muse @ http://sally1029.wordpress.com

  8. You might want to consider a software solution to this problem.

    We make ZoomText Express, a full screen magnifier built specifically for folks who squint at the screen and have trouble seeing the fine print. Take a look at our video

    http://www.aisquared.com/zoomtextexpress

    Digital Versions of the product are only $49.99

  9. I think i will need to buy the same soon. i work at the computer much and i do not want to become blind at 40 years…. thank you for such an information

  10. I haven’t tried computer glass and would really prefer not to have to wear them; however, I did invest in a Cubeshield (http://www.cubeshield.com) for my office cubicle. It blocks some afternoon glare coming from the windows on the west side of our office building.

    Dawn

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