Stop squinting — combat computer eye strain
Sharon Ward spends about four hours a day looking at her computer screen. Recently the 55-year-old production manager of a Halifax publishing company began experiencing eye strain because her everyday "varifocal" glasses — for far-, mid- and close-range focusing — were aggravating her vision when she did computer work.
Ward says the narrow ranges for mid- and near reading were causing neck strain because her head was tilted at an unnatural angle. "So I would start reverting to my normal angle," she says. "Then I couldn't see properly at mid- and near ranges. The words would swim in front of me, and my computer screen and the people across the desk from me would be ever so slightly out of focus."
Ward's optometrist prescribed a new pair of glasses to be worn while doing computer work and working at her desk. "The focus is divided into just two ranges, mid and near," she says. "So when I look at my desk or read, I can see well and my eyes don't get strained."
As a result of increased computer use, computer vision syndrome (CVS) — eye and vision problems linked to extended computer use that can affect adults and children — is an increasingly common affliction. Symptoms include dry, irritated, inflamed or sore eyes; headaches; and blurred vision.
The good news? "CVS makes you feel lousy but it won't cause permanent damage to the eye," says Dr. Paula Gaudet, a Halifax optometrist and past president of the Nova Scotia Association of Optometrists, who estimates that as many as 25 per cent of her patients have CVS.
Remember to rest your eyes
To prevent CVS, take frequent "eye breaks" from your computer. The Canadian Association of Optometrists website suggests that you step away from the screen for 15 minutes during each two-hour period or for 10 minutes per hour of intensive work.
The ideal distance from your eyes to the screen will vary with your size, posture and workstation design; your optometrist can advise you on the proper distance. The recommended viewing angle of the screen centre is 10 to 20 degrees — or three to four centimetres — below eye level. If possible, prop copy documents upright beside the screen to avoid awkward head or eye movements.
When we stare at the monitor we blink less frequently, which dries the eyes; using an over-the-counter eye lubricant can help moisten them. Squinting at blurred, fuzzy or tiny characters for hours can contribute to CVS. "If you have to lean forward or backward to read what's on the screen, the text is too small," says Dr. Gaudet. "Increase the point size until you can read it easily while sitting back comfortably in your chair." To increase a font's point size in a word-processing program such as Word, go to Format > Font > Size. To increase point size while reading on the web, in Internet Explorer go to View > Text Size and select from Largest to Smallest.