COMPUTER VISION SYNDROME (CVS)
It refers to a group of vision and body related discomforts which result from prolonged use of screens (computer, tablet, phone screens etc.)
These discomforts involve the eye, head and neck. The level of discomfort is determined by the amount of usage time. These discomforts involve the eye, head and neck. The level of discomfort is determined by the amount of usage time.

Symptoms of CVS
🔅Eye strain
🔅Headache
🔅Blurred vision
🔅Dry eyes
🔅Double vision
🔅Dizziness/Vertigo
🔅Neck/Shoulder pain
🔅Eye fatigue

Symptoms may be worsened by the following;
💠Poor lighting condition
💠Poor sitting posture
💠Air moving over the eyes (from overheard fan etc.)
💠Uncorrected, undercorrected and over corrected refractive error
💠Improper viewing distance
💠Blinking less than normal
💠Uncorrected, undercorrected and over corrected refractive error
💠Improper viewing distance
💠Blinking less than normal
In detail:

🔺Poor lighting condition: Glare and reduced contrast of screen work and web pages makes the eye overwork. This leads to eye strain and headache.
🔺Poor sitting posture: Sitting/lying down wrongly put stress on your spine leading to neck and/or shoulder pain.
🔺Air moving over eyes: Rate of evaporation of lubrication fluid(tear film) of the eye surface is increased, hence dry eye.
🔺Uncorrected, undercorrected and over corrected refractive error: Generally, short-sighted individuals (myopes) prefer near distance work to far-sighted persons (hyperopes). Farsighted individuals’ eyes tend to overwork during near distance work (especially with phone and tablets), hence the eye strain, blur vision and headache. This is the same for presbyopia individuals. [Note that this is when they do not have their prescriptions/spectacles on).
🔺 Improper viewing distance: Viewing distance range for a book/newspaper is safer and more adjustable than for a computer screen. Wrong desk/chair height leads to physical strain in the form of neck/shoulder tension. Also, the back and forth movement.
🔺Blinking less than normal: The average healthy eye blinks about 15 times a minute. Laptop and computer users blink about a third less. This leads to dry eyes since the eye’s surface is not well lubricated.
REMEDIES FOR CVS.

  1. 20-20-20 rule: When you are before a screen, take a break every 20 minutes for 20 seconds and look at an object about 20 feet(6 meters) away.
  2. Adjust the level of your screen in relation to your eyes.
  3. Sit at an arm’s length (approx. 25 inches) from your computer screen.
  4. Use antiglare screens.
  5. Take breaks to blink.
  6. For far-sighted people and presbyopes, it’s advisable to have your spectacles on when using your phone.
  7. Request to adjust spectacle designs if needed. Blue light filters, anti-relectuve coating etc could be inputted.
  8. When working at night, use dark-user interface (night/dark mode).
  9. Close your eyes and relax your face and neck muscles for two minutes every half hour when behind a screen.

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