Safety In Engineering Industry >Chapter 6 > Topic- Safety in IT & Electronic Industry > Sub-Topic- Computer Vision Syndrome

 Computer Vision Syndrome (CVS)

What is Computer vision Syndrome (CVS) ? 

Computer vision syndrome (CVS) is a condition caused by prolonged use of digital devices such as computers, smartphones, and tablets. It is characterized by a group of eye and vision-related problems that result from extended screen time. 

Viewing a computer or digital screen is different than reading a printed page. Often the letters on the computer or handheld device are not as precise or sharply defined, the level of contrast of the letters to the background is reduced, and the presence of glare and reflections on the screen may make viewing difficult.

Symptoms of CVS occur because the visual demands of the task exceed the visual abilities of the individual to comfortably perform them. At greatest risk for developing CVS are those persons who spend two or more continuous hours at a computer or using a digital screen device every day. 

Reasons of the Computer Vision Syndrome 

• Extended periods of screen time
• Poor lighting conditions
• Glare on a digital screen.
• Incorrect posture while sitting in front of the computer
• Poor ergonomics of the workspace
• Unhealthy habits such as inadequate sleep and a poor diet

Symptoms of the Computer Vision Syndrome

• Eye strain and fatigue
• Dry eyes and irritation
• Blurred vision
• Headaches
• Neck and shoulder pain
• Difficulty focusing 

How to Diagnose  Computer Vision Syndrome ?

• CVS, or digital eyestrain, can be diagnosed through a comprehensive eye examination. 

• Patient history to determine any symptoms the patient is experiencing and the presence of any general health problems, medications taken or environmental factors that may be contributing to the symptoms related to computer use.

• Visual acuity measurements to assess the extent to which vision may be affected.

• A refraction to determine the appropriate lens power needed to compensate for any refractive errors (nearsightedness, farsightedness or astigmatism).

• Testing how the eyes focus, move and work together. In order to obtain a clear, single image of what is being viewed, the eyes must effectively change focus, move and work in unison. This testing will look for problems that keep the eyes from focusing effectively or make it difficult to use both eyes together. 

Prevention or Remedies for Computer Vision Syndrome (CVS) -

• Take frequent breaks from the screen (the 20-20-20 rule: take a 20-second break every 20 minutes and look at something 20 feet away) 
  
  
  

• Ensure proper lighting conditions and adjust the brightness of the screen to reduce glare

• Maintain correct posture and ergonomics of the workspace

• Use artificial tears to lubricate dry eyes

• Adjust the display settings of the screen to reduce eye strain

• Consider using blue light blocking glasses to reduce the harmful effects of blue light emitted by screens

• Practice healthy habits such as adequate sleep, a balanced diet, and regular exercise

• If you experience persistent symptoms of CVS despite these remedies, it is important to seek advice from an eye doctor.

What should be distance and sitting position ?

To avoid computer vision syndrome, it is important to maintain the correct distance and sitting position while using digital devices such as computers, smartphones, and tablets. Here are some tips:

Distance: Sit at an arm's length away from the screen of the computer or digital device you are using. This distance should be comfortable for you and prevent you from having to strain your eyes to read the screen.

Sitting position: Sit upright in your chair with your feet flat on the floor. Keep your shoulders relaxed and your back supported by the chair. Your computer screen should be at eye level, so you are not looking up or down at the screen.

Monitor position: The top of the monitor should be at or slightly below eye level, and the monitor should be placed at a comfortable viewing distance, usually an arm's length away.

Lighting: Make sure the lighting in the room is appropriate for computer use. Avoid harsh overhead lighting or bright sunlight shining directly on the screen. Use curtains, blinds, or other window treatments to reduce glare.

Take breaks: Take frequent breaks and give your eyes a rest. Follow the 20-20-20 rule - every 20 minutes, take a 20-second break and look at something 20 feet away.

References- 

Google.com 

https://www.nhp.gov.in/disease/eye-ophthalmology-/computer-vision-syndrome

Website- AMERICAN OPTOMETRIC ASSOCIATION