Computer Vision Syndrome
Computer Vision Syndrome [C V S ] is a temporary condition resulting from focusing the eyes on the computer display for a protracted, uninterrupted period of time.
When we look in the distance, our eyes are relatively relaxed & at rest. But when we look at the computer continuously: The characters on the computer screen do not have well-defined edges. They are brightest at the centre & diminish in intensity towards the edges. This makes it very difficult for the eyes to maintain focus extensive focusing does not give much opportunity for the eye muscles to move & which leads to eye strain, burning, tiredness, and dryness.
Causes
- Poor position in relation to computer
- Longer use of computers leads to a decrease in blink reflex. Normal blink rate 16 – 20 per minute.
- Glare or reflections, fuzzy images or images that are too dim or too bright.
- Use of glasses that are inappropriate for the users’ position and distance from the screen.
- Minor visual defects such as astigmatism that might go unnoticed can be exaggerated with intense computer use.
- Uncorrected visual acuity.
- Constant gazing at a near distance leads to convergence fatigue.
Symptoms
- Eye strain
- Headache
- Blurred vision
- Fatigue
- Neck, Shoulder & Back pain
- Dry, irritated eyes
- Difficulty in refocusing the eye
- Double vision
- Redness and watering of eyes
- Temporary nearsightedness
- Photophobia: Decreased tolerance to light
Management
- Ocular therapy with adjustment of the workstation.
- Proper lighting
- Anti-glare filter
- Ergonomic positioning of computer monitor
- Regular work breaks help improve visual comfort
- Upgrade your display
- Adjust the brightness & contrast of your computer screen
- Blink more often
- 20-20-20 Rule – every 20 minutes, focus the eye on an object 20 feet away for 20 seconds
- Take frequent breaks, to reduce your risk for computer vision syndrome & neck, back, and shoulder pain.
- Avoid air drafts
