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What is a Computer Vision Syndrome


4 min


What is a computer vision syndrome

From smartphones and tablets to laptops and desktop computers, we spend a significant portion of our day staring at screens. While these devices have undoubtedly improved our lives in many ways, they have also given rise to a new set of health concerns. One such concern in definitely a Computer Vision Syndrome (CVS).

In this blog post, we’ll delve into the symptoms and factors contributing to CVS. Furthermore, we’ll particularly focus on the often-discussed culprit – blue light.

What is a Computer Vision Syndrome

Computer Vision Syndrome (CVS), also known as Digital Eye Strain, CVS is a collection of eye and vision-related problem that result from prolonged use of digital devices.

Computer Vision Syndrome Symptoms

CVS encompasses a range of eye and vision-related problems that result from prolonged computer use. Common symptoms include:

  1. Eye strain: Prolonged screen time can lead to discomfort and fatigue, causing eye strain. Symptoms include sore, tired, burning, or itching eyes.
  2. Headaches: Frequent headaches are a common symptom of CVS and are frequently caused by extended screen staring.
  3. Blurred Vision: Blurriness or difficulty focusing on objects after extended periods of screen use is another prevalent symptom.
  4. Dry Eyes: Reduced blinking while focusing on screens can result in dry eyes, leading to irritation and discomfort.
  5. Neck and Shoulder Pain: Poor posture during screen use can contribute to neck and shoulder pain, worsening the physical toll of CVS.

These issues are not exclusive to adults; children and teenagers who spend extended periods in front of screens are also susceptible to developing CVS.

Causes of Computer Vision Syndrome

  1. Extended Screen Time: With jobs, education, and entertainment moving online, individuals are spending more time in front of screens, contributing to the rise of CVS.
  2. Blue Light Exposure: Digital screens emit blue light, which can disrupt the circadian rhythm and contribute to eye strain and discomfort.
  3. Blue Light Eye Damage: Blue light, particularly in the high-energy spectrum, has been associated with potential damage to the eyes. Studies suggest that prolonged exposure to blue light may contribute to retinal damage, increasing the risk of age-related macular degeneration (AMD).
  4. Poor Ergonomics: Incorrect viewing angles, improper lighting, and uncomfortable seating arrangements can exacerbate CVS symptoms.
  5. Uncorrected Vision Problems: Individuals with uncorrected vision problems, such as farsightedness or astigmatism, may be more susceptible to CVS.

Blue Light Wavelength and Its Role

Blue light, with its shorter wavelength and higher energy, is a key component of the visible light spectrum emitted by digital screens.

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While exposure to natural sunlight is essential for regulating our circadian rhythm and promoting wakefulness, excessive exposure to artificial blue light from screens can have detrimental effects on our eyes and overall well-being.

Disruption of Circadian Rhythm

Prolonged exposure to blue light, especially in the evening, can interfere with the body’s production of melatonin, a hormone that regulates sleep. This disruption can lead to difficulty falling asleep and poor sleep quality.

Increased Eye Strain

Blue light scatters more easily than other colors, leading to a higher level of visual noise and increasing the effort required for our eyes to focus. This heightened strain contributes to the development of CVS symptoms.

Blue light wavelength and eye damage

Prevention and Management of Computer Vision Syndrome

  1. Follow the 20-20-20 Rule: Take a 20-second break every 20 minutes and look at something 20 feet away to reduce eye strain.
  2. Adjust Screen Settings: Modify screen brightness, contrast, and font size to create a comfortable viewing environment.
  3. Proper Lighting: Ensure adequate lighting in your workspace, minimizing glare and reflection on screens.
  4. Use Blue Light Filters: Employ blue light filters on screens or wear blue light-blocking glasses to reduce exposure.
  5. Regular Eye Exams: Schedule regular eye exams to detect and address vision problems that may contribute to CVS.


As we navigate the digital landscape, understanding and addressing Computer Vision Syndrome becomes very important. By adopting healthy screen habits and incorporating preventive measures, individuals can strive to protect their eyes from the potential long-term effects of prolonged screen exposure, particularly the potential damage associated with blue light wavelengths.

Frequently Asked Questions

What is the 20-20-20 rule, and how does it help with Computer Vision Syndrome (CVS)?

The 20-20-20 rule is a simple guideline to reduce eye strain during prolonged screen use. Every 20 minutes, take a 20-second break and look at an object at least 20 feet away. This practice helps relax the eye muscles, reduce fatigue, and prevent the onset of CVS symptoms.

Do blue light-blocking glasses help?

Blue light-blocking glasses can be beneficial in reducing the potential negative effects of blue light exposure from digital screens.These glasses are designed to filter out or block a portion of the blue light emitted by electronic devices, such as computers, smartphones, and tablets.

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