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Management and prevention of Computer Vision Syndrome

1. 5.1
   Objective: To know about the tips to prevent Computer Vision Syndrome (CVS) – Rule of Triple "A"s 
   
   What is the Rule of Triple "A"? To prevent eye problems related to prolonged use of digital screen devices, there are generally three adjustments to be remembered – the Rule of Triple "A"s preventive strategies:

1. 5.2
   Adjust environment
   
2. 5.3
   Adjust digital screen devices 
   
3. 5.4
   Adjust behaviours 
   

   Remember to blink regularly and completely	""20-20-20 see beyond the screen rule" – look at something 20 feet (or 6 m) away for 20 seconds every 20 minutes	Limit electronic device use and increase outdoor play	Seek advice from eye care professional to exclude serious eye problems if symptoms persist

1. 5.5
   How do you manage dry eye?
   

   Dry eye is a major complaint that is targeted in the therapy of CVS. With the triple "A"s strategies (Adjust environment, Adjust digital screen devices and Adjust behaviors), most of the dry eye symptoms can be improved. Several additional environmental adjustments may also be helpful, such as using a room humidifier, and redirection of heating or air conditioning vents away from the eyes. In severe cases (e.g., eye pain, tearing, redness), the use of artificial-tear eye drops help alleviates the symptoms of dry eye.
   using a room humidifier	redirection of heating or air conditioning vents away from the eyes	use artificial-tear eye drops
   However, if the symptoms do not improve, it is important to seek professional medical advice to ensure there are no other underlying eye conditions that may exacerbate dry eye symptoms (e.g., blepharitis, allergic eye disease).

1. 5.6
   What is the role of refractive errors in CVS?
   Almost 3 out of 4 people who have CVS wear eyeglasses or contact lenses. In addition, people with uncorrected refractive errors are more likely to have CVS or experience more profound symptoms. It is therefore important to visit an eye care professional to check for any undiagnosed refractive errors, and to ensure eyeglasses (or contact lenses) are up-to-date and well fitted. Contact lens users should also ensure proper care of their contact lenses, and stop using contact lenses and consult an eye care professional if they cause significant discomfort.
   

1. 
   
   5.7 Summary
   
   Congratulation! You have completed Chapter 5. You should now be able to understand the Rule of Triple "A"s to prevent the Computer Vision Syndrome (CVS).

1. 5.8
   Further reading:
   "Eye Care" (GovHK)