IN general, computer users are exposed to three types of hazards due to poor ergonomics; eye strain (visual fatigue), work-related musculoskeletel disorders (WMSDs) and backache.
Eye strain is caused by overuse os the muscles around and within the eyes responsible for positioning and controlling the eyes' movements.
It can be caused by inappropriate viewing height and distance, poor monitor positioning in relation to overhead lights and windows, glare, unsuitable environmental conditions (inadequate lighting, temperature and humidity), characterisics of the display (such as colour contrast, font type and font size) and extended screen work without break.
The most common WMSD is carpal tunnel syndrome (CTS). It is caused by the compression of the median nerve due to swelling and irritation of the tendon in the carpal tunnel. The common factors associated with CTS are irregular wrist posture (such as wrist flexion or extension during typing), rapid finger movement, forceful gripping and vibration.
Backache, as a result of sedentary work involving computers, is often due to poor working posture, prolonged sitting and poor workstation design. For example, a poorly designed chair that is not adjustable and without a fully supported backrest can give rise to backache.
One way to reducing health hazards due to poor ergonomics is to observe the following working posture:-
Eye strain is caused by overuse os the muscles around and within the eyes responsible for positioning and controlling the eyes' movements.
It can be caused by inappropriate viewing height and distance, poor monitor positioning in relation to overhead lights and windows, glare, unsuitable environmental conditions (inadequate lighting, temperature and humidity), characterisics of the display (such as colour contrast, font type and font size) and extended screen work without break.
The most common WMSD is carpal tunnel syndrome (CTS). It is caused by the compression of the median nerve due to swelling and irritation of the tendon in the carpal tunnel. The common factors associated with CTS are irregular wrist posture (such as wrist flexion or extension during typing), rapid finger movement, forceful gripping and vibration.
Backache, as a result of sedentary work involving computers, is often due to poor working posture, prolonged sitting and poor workstation design. For example, a poorly designed chair that is not adjustable and without a fully supported backrest can give rise to backache.
One way to reducing health hazards due to poor ergonomics is to observe the following working posture:-
1. Keep your head level or slightly tilted downward.2. Sit with yout shoulders relaxed, not elevated.
3. Keep your elbow close to your sides and bent at aboutm90-degree angle, not extended out in front of your body.
4. Use chair with backrest to support your lower back.
5. Sit with your entire upper body upright or learning slightly back.
6. Keep your wrists straight while your work.
7. Sit with your knees at same level of your hip.
8. Place your feet slightly out in front of your knees and make sure they are comfortaby supported by floor or footrest.
Source: Mohd Asyraf Che Doi, lecturer-cum-trainer and consultant in ergonomics at Universiti Malaysia Perlis.
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