In this day and age, computers, smart phones and similar technologies are everywhere. Many hours are spent by most of us, either during our leisure time or for work, looking at the lighted screen of a computer or smart phone. This often leads to a group of eye and vision-related disorders commonly referred to as Computer Vision Syndrome.
As much as 90 percent of all people who consistently work with computers suffer from eye strain and other symptoms associated with Computer Vision Syndrome. The most common symptoms associated with Computer Vision Syndrome (CVS) are:
A number of causes may lead to these symptoms, including:
Fortunately, many of these symptoms are temporary and tend to fade as soon as the person leaves the computer for a significant amount of time. However, there are instances in which individuals do experience reduced visual abilities, such as blurred distance vision, even though they have stopped working at their computer. In this case, symptoms may continue to recur and even worsen with future computer use if steps are not taken to address the issue.
Fortunately, there are many steps one can take to reduce his/her risk of computer eye strain and other common symptoms of computer vision syndrome. These include changing your monitor settings to accommodate your vision more comfortably, performing certain eye exercises to keep your eyes from straining and changing your work set up to reduce glare and uncomfortable lighting conditions.
At greatest risk for developing CVS are those persons who spend two or more continuous hours at a computer every day.
The eyes tend to have to work harder when viewing a computer screen, making many individuals susceptible to the development of eye and vision-related symptoms.
Letters on the computer screen are often not as precise or sharply defined as they are on a printed page, and the level of contrast of the letters to the background is also generally reduced, making letters harder to discern.
Viewing distances and angles used for computer work are also often different from those commonly used for other reading or writing tasks. As a result, the eye focusing and eye movement requirements for computer viewing can place additional demands on the visual system.
Vision problems like farsightedness and astigmatism that have gone untreated tend to make symptoms worse, as do inadequate eye focusing or eye coordination abilities, and changes in the eyes as a consequence of aging, such as presbyopia.
Even those with a proper eyeglass or contact lens prescription may find specific viewing distances of their computer screen uncomfortable. This causes some people to tilt their heads at odd angles or bend toward the screen because their glasses aren't designed for some of the difficulties of computer viewing. Poor posture often results, and can cause muscle spasms or pain in the neck, shoulder or back.
Usually a comprehensive eye examination is enough to identify symptoms of CVS. Testing, with special emphasis on visual requirements at the computer working distance, may include:
Using the information obtained from these tests, along with results of other tests, your optometrist can determine if you have Computer Vision Syndrome and advise you on treatment options.
Even individuals who do not require eyeglasses or contacts for other daily activities can benefit from specially designed “computer glasses,” prescribed specifically for computer use. Persons already wearing glasses may find their current prescription does not provide optimal vision for viewing a computer, and may also consider computer glasses.
Some computer users experience problems with eye focusing or eye coordination that can't be adequately corrected with eyeglasses or contact lenses. A program of vision therapy may be needed to treat these specific problems. Vision therapy, also called visual training, is a structured program of visual activities prescribed to improve visual abilities. It trains the eyes and brain to work together more effectively. These eye exercises help remediate deficiencies in eye movement, eye focusing and eye teaming and reinforce the eye-brain connection. Treatment may include office-based as well as home training procedures.
Viewing the Computer
Some important factors in preventing or reducing the symptoms of CVS have to do with the computer and how it is used. The following are a few factors to consider:
Regular eye examinations and proper viewing habits can help to prevent or reduce the development of the symptoms associated with Computer Vision Syndrome.