Computer vision syndrome: What you need to know

What is CVS?

The American Optometry Association classifies computer vision syndrome as a collection of eye and vision problems related to computer work. The reason behind the condition is quite simple. Essentially, our eyes are used to reading print. The contrast of type to background is high (usually black on white), letters have clearly defined edges and the images are stable. However, your eyes respond differently to images and text on a computer screen which have "fuzzy edges" due to how pixels are displayed. Your eyes therefore have to work harder to focus, and may be constantly adjusting and re-adjusting to keep the image as stable and clear as possible. Improper lighting conditions, viewing distance and glare also make it harder to see the screen comfortably. People who already experience vision problems such as near-sightedness or astigmatism, or who wear bifocals or trifocals, may have even more difficulties.

Sound exhausting? It's not surprising that all this extra work can lead to eye strain other symptoms including blurred vision, double vision, dry or irritated eyes, headaches, neck and shoulder strain and fatigue. In addition to being uncomfortable, CVS can affect your focus and productivity at work.

The good news is much of the stress and discomfort can be alleviated (and prevented!) through changes to your work environment and habits.