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Health Administration

Prolong exposure to computer screens may cause temporary visual fatigue. Factors

including working environment, working habit and posture, screen flicker and blue light

contribute to this condition. To minimize visual fatigue certain adjustments can be made on

the work stations or using suitable computer screens with features that alleviate eye strain.

Environment

Visual fatigue is affected by the working environment. Glare reductions and appropriate

lighting situations help minimize this condition.

● Glare reduction

Glare can be reduced by

● Lighting

Adequate lighting is necessary to avoid glare and eye fatigue. Excessive or insufficient

lighting makes the display on screen harder to see. Generally, lighting level should not

exceed 750 lux and levels ranging from 300 to 500 lux are most appropriate for computer

desk work. Recommended lighting arrangement includes positioning work stations away

from direct sunlight or using overhead lighting with baffles or louvers that reduces glare.

Working Habits

Long exposures to computer screens may cause eye strain. Symptoms include headache,

burning eyes, blurred vision and discomfort. To minimize eye strain, computer users can

adjust working habits to let their eyes relax and recover.

● Break Times

Computer users should take some time away from the screen especially if working for

prolong hours. Generally, it is recommended to take short breaks (5 – 15 mins) after 1 –2

hours of continuous computer works. Taking short and frequent breaks is more advised

than longer breaks.

● Looking at Distant Objects

Users often blink less when in front of monitor screen. To minimize eye strain and dryness,

users should rest the eye periodically by focusing on objects that are far away.

● Eye and Neck Exercises

Certain exercise reduces eye strain and prevent early onset of musculo-skeletal disorders. It

is recommended to repeat these exercises often. However, should symptoms persists it is

recommended to consult a physician.

Changing position of any light source that is causing the glare.

Fitting the light sources with appropriate diffusers or lampshade.

Using curtains or blind on windows to minimize glare from direct sunlight.

Adjusting monitor position to be perpendicular to the source of light or windows.

Using an anti-glare screen - ThinkVision monitors have anti-glare surface treatment that

scatters light for a reflection-free work usage.

Chapter 2. Adjusting and Using your monitor 2-2