Computer Vision Syndrome


Suraj Thapa

B. Optometry

Computer Vision Syndrome (CVS) is a combination of different eye problems caused by prolonged visual display unit (VDC) use. If a person works for a long time in electric gadgets like computer, tablet, mobile, TV and so on, he/she will experience a sharp decline in a blinking rate. Normal blinking rate of 14-16 per minute is declined to 5-6 per minute. This causes evaporation of tear from the eye surface and thus, dryness of the eye.
Apart from this, a user will experience eye discomfort and vision problem due to excessive stress and overload of work while spending much amount of time in a computer, and concentrating near for a long time. This causes accommodation disorders and deterioration of accommodation facility.


If a person experiences a problem of fatigue of eyeball, eyestrain, double vision, headache, watering and blurred vision after a prolonged computer work, he/she may have a problem of Computer Vision Syndrome or Digital Eye Strain. Furthermore, he/she experience neck and shoulder pain. This may be caused by poor lighting, improper viewing distance, glare on a digital screen, poor seating posture and uncorrected vision problem.


Person with CVS should be evaluated by Optometrist and Ophthalmologist. He/she may have to wear glass with full correction of refractive error (nearsightedness, farsightedness or astigmatism). Apart from this, he/she is advised to use anti-reflection coating in a glass. Special care should be given to ergonomics.
In addition to this, he/she should change the lighting of room to reduce glare on the computer screen. And also the position of computer should be at appropriate i.e. slightly below eye level, about 20 to 28 inches away from the face. It is suggested for blinking more frequently while using computer, mobile and other digital devices and gently squeezing eyelids together to wash eyes fully to avoid dry eye. If eyes are getting overly dry, try using lubricating eye drops.If necessary Optometrist or ophthalmologist prescribes using nutritional supplements containing essential fatty acids which help to decrease dry eyes.

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