Computer vision syndrome (CVS) is a term used to describe a group of eye and vision-related problems that can occur as a result of prolonged use of digital screens, such as computers, tablets, and smartphones. These problems can include eye strain, headaches, blurred vision, dry eyes, and neck and shoulder pain.
The exact cause of CVS is not well understood, but it is thought to be a combination of factors including glare, poor lighting, and incorrect viewing distances. Prolonged use of digital screens can cause the eyes to work harder than usual, leading to fatigue and strain. The blue light emitted from screens can also cause the eyes to dry out, leading to symptoms such as dryness and itching. In addition, the high-resolution screens and small font sizes can cause visual discomfort, which can lead to symptoms such as headaches and blurred vision.
CVS is a prevalent condition and it's affecting a large number of people who spend a significant amount of time in front of a screen. According to a survey conducted by the American Academy of Ophthalmology, more than 70% of computer users experience symptoms of CVS. The condition is more common in people who use computers for more than three hours per day, and the symptoms can be more severe in people who have pre-existing eye conditions such as near-sightedness or dry eyes.
Some common symptoms of CVS include:
- Eye strain: This is a common symptom of CVS, which can result in feelings of fatigue, discomfort, and pain in the eyes. The eyes may feel dry, itchy, or watery, and may appear red or swollen.
- Headaches: Prolonged use of digital screens can cause headaches, which can range from mild to severe. The pain can be concentrated around the eyes, temples, or back of the head.
- Blurred vision: Prolonged use of digital screens can cause the eyes to focus harder than usual, leading to blurred vision. This can make it difficult to see fine details or read small text.
- Dry eyes: The blue light emitted from screens can cause the eyes to dry out, leading to symptoms such as dryness, itching, and redness.
- Neck and shoulder pain: Prolonged use of digital screens can cause people to adopt poor posture, which can lead to pain and discomfort in the neck and shoulders.
- Difficulty sleeping: The blue light emitted from screens can disrupt the production of melatonin, a hormone that regulates sleep. This can make it difficult to fall asleep and wake up feeling rested.
To prevent or alleviate CVS, there are several effective strategies that can be implemented.
- Adjust your monitor settings: The first step in preventing CVS is to adjust the settings on your computer monitor. This includes adjusting the brightness, contrast, and text size to ensure that they are comfortable for your eyes.
- Take frequent breaks: Prolonged use of a computer can lead to CVS, so it's important to take frequent breaks. This can include taking a short break every hour, or using the 20-20-20 rule, where you take a break every 20 minutes and look at something 20 feet away for 20 seconds.
- Blink frequently: Blinking helps to keep your eyes lubricated and can prevent dryness. When you're focusing on a computer screen, you tend to blink less, which can lead to dry eyes and CVS.
- Use artificial tears: If your eyes feel dry, it's a good idea to use artificial tears to help lubricate them.
- Adjust the lighting in your work area: Proper lighting can also help to reduce CVS.