computer vision syndrome

Computer vision syndrome, also known as digital eye strain. It is a group of vision and eye problems caused by excessive computer, and mobile phone use.

When watching digital displays for long periods, many people experience eye discomfort or eye pain and vision issues. The amount of time spent in front of a computer screen tends to increase the level of discomfort.

The average American worker spends seven hours a day in front of a machine, whether at work or home. Use the 20-20-20 rule to reduce digital eye strain: every 20 minutes, take a 20-second break to look at something 20 feet away.

What is the Cause of Computer Vision Syndrome?

Your eyes have to function harder when you’re looking at a television or a digital screen. As a result, many people are vulnerable to vision-related symptoms. Due to the high visual demands of computer and digital screen viewing.  

Computer vision syndrome (CVS) or digital eye strain symptoms may be made worse by uncorrected vision issues. Reading a written page is not the same as looking at a monitor or digital screen. The letters on a monitor or handheld device are often less precise or marked. 

The contrast between the letters and the background is diminished, and glare and reflections on the screen can obstruct visibility.

Viewing distances and angles for this type of work are different from those required for other types of reading and writing.

Furthermore, even mild vision issues may impact comfort and efficiency when using a computer or other digital screen device. Computer related eye strain may be triggered by uncorrected vision problems.

Those with a prescription for eyeglasses or contact lenses may find that they are not compatible with their computer screen viewing distances. Since their glasses aren’t made for looking at a monitor, some people turn their heads toward the screen to see it. Muscle spasms or pain in the neck, shoulder, or back may result from their postures.

In most cases, signs of CVS arise when the task’s visual demands surpass the person’s visual ability to perform them. Those who spend two or more hours a day at a monitor are at the highest risk of developing CVS.

Computer Vision Syndrome Symptoms

  • Eyestrain is one of the most common signs of CVS or optical eyestrain.
  • Migraines.
  • Vision that is hazy.
  • Eyes that are dry.
  • Shoulder and neck pain
  • Inadequate lighting may be the source of these symptoms.
  • Glare on a computer screen
  • Inadequate viewing distances
  • Bad sitting posture.
  • Vision issues that haven’t been fixed.
  • A mixture of the above variables.

How Does Computer Vision Syndrome Prevented? 

Posture while using computer

A thorough eye examination can detect CVS, also known as optical eyestrain. 

  • Visual acuity tests are used to measure the extent to which vision may harm.
  • Refraction is used to determine the proper lens power for correcting refractive errors.
  • Examining how the eyes concentrate, shift, and collaborate. The eyes must shift direction, switch, and act in synchronization to produce a consistent, single picture of what is being viewed. 

This examination will look for issues that prevent the eyes from concentrating or find it challenging to use both eyes simultaneously.

This experiment can be done without the use of eye drops to see how the eyes react under normal conditions. In certain cases, eye drops or artificial tears are often used, when some of the eye’s focusing power remains blocked, for example.

They prevent the eyes from shifting focus when the tests are being performed. CVS is risky and can result in irreversible vision loss or eye damage. To prevent irreversible harm, it’s always a smart idea to repair the issue.

How Does Computer Vision Syndrome Affect You?

Digital computer vision issues are being handled in a variety of ways. These can, however, usually be avoided by taking daily eye care and altering your screen viewing habits.

Individuals who do not need eyeglasses for other everyday activities may benefit from glasses designed for computer use in some cases. Furthermore, people who already wear glasses can discover that their current prescription does not provide the best vision for computer use.

  • prescription eyeglasses or contact lenses should not be adequate for computer work. Computer viewing can cause the use of lenses designed to meet the visual demands of this task. Unique lens designs, lens powers, tints, and coatings can improve visual abilities and comfort.
  • Eyeglasses or contact lenses can’t help some computer users with eye focusing or alignment issues. To address these issues, a vision therapy program may needed.


Vision therapy, also known as visual preparation, is a standardized curriculum of visual exercises designed to help people develop their vision. It teaches the eyes and brain to function more efficiently together. These eye exercises improve eye coordination, concentration, and team while also strengthening the eye-brain link. Treatment options include both in-office and at-home training.

Computer Vision Syndrome Treatment


How Does the 20 20 20 Rule Prevent Eye Strain?

Computer use requires proper body positioning. The machine and its use are two significant factors in avoiding or minimizing the symptoms of CVS. Lighting, chair comfort, location of reference materials, display position, and usage of rest breaks are all factors to consider.

  • The monitor’s position on the computer. The majority of people prefer to look at a computer screen with their eyes down. The display screen should be 15 to 20 degrees below eye level, and 20 to 28 inches away from the eyes.
  • Materials for scientific research. The user should keep the materials above and below the keyboard and display. If this isn’t possible, keep a record holder near the computer. The goal is to arrange the documents so that the user’s head does not have to move from paper to computer.
  • The lighting. Stop glares from overhead lights or windows by positioning the computer screen. Replace the light bulbs in desk lamps with lower wattage bulbs and use blinds or drapes on walls.
  • Displays that reduce glare. Consider using a screen glare filter if there is no other way to reduce glare from light sources. These filters cut the amount of light reflected from the screen.
  • Your seat’s exact location. Chairs should be well-padded and tailored to the body’s shape. Change the chair’s height so that your feet are level with the ground. When typing, keep your wrists off the keyboard and adjust your arms to protect yourself.
  • Take a break. If you’re going to be staring at a phone for an extended amount of time, take a break. Taking a 15-minute break after two hours of continuous computer use. Take a 20-second break after 20 minutes of screen time to look into the distance to allow the eyes to refocus.
  • The act of blinking. When using a screen, aim to blink regularly to reduce the risk of getting dry eye. Blinking keeps the front surface of the eye moist.
  • Choose the best pair of glasses for you. If you need glasses or contacts and work at a computer, you might consider purchasing computer-specific glasses or contact lenses. Inquire with your optometrist about lens coatings and tints, which may be beneficial.

Is Computer Vision Syndrome Dangerous or Permanent?

Computer Vision Syndrome, is not a lifelong disorder. However, if you do not alter how you use screens, the symptoms can become more serious. Although CVS is dangerous and can cause permanent vision or eye injury. It’s still a good idea to fix the issue to avoid permanent damage.

Computer Vision Syndrome and Blink Rate.

According to research, CVS affects up to 90% of computer users on a regular basis. As opposed to general viewing, machine users can have a blink rate that is 50 per cent lower. When using a screen, patients with CVS are often told to blink more.

Regular eye exams and good viewing habits can help to avoid or delay the onset of CVS symptoms.

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