Eye Strain and Your Computer Monitor

Even though there is no satisfactory scientific evidence that computer video display terminals (VDTs) are harmful to the eyes, reports of eye discomfort and fatigue are increasing as the number of people using computers grows.

Extensive government laboratory testing has concluded that little or no harmful ionizing radiation, (X-rays), or non-ionizing (ultraviolet) radiation is produced by VDTs under normal operating conditions. Surprisingly, the amount of ultraviolet radiation by VDTs is relatively small compared to that produced by fluorescent lighting. Even after a lifetime of exposure, the levels of radiation produced by VDTs are well below what is required to produce cataracts or other eye damage.

Although you cannot damage your eyes by working on a VDT, you will experience eyestrain. The symptoms may include eye irritation (red, watery or dry eyes), fatigue (tired, aching heaviness of the eyelids or forehead), and difficulty focusing. You may also experience headaches, backaches, or muscle spasms due to the arrangement of the workstation.

The relief to eyestrain may be as simple as a prescription for glasses. Your ophthalmologist will be able to diagnose whether your discomfort is due to simple eyestrain or unsuspected disease.

To cut down on eyestrain:

• Position the VDT so that the top of the screen is at or below eye level.
• Make sure your reference material is as close to the screen as practical to cut down on head and eye movements and focusing changes.
• Arrange your lighting, if possible, so that reflections and glare are minimized.
• Wipe your screen often with an anti-static cloth to improve visibility.
• Take periodic rest breaks and blink often to prevent your eyes from drying out.
• Keep the screen in proper focus.