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Information About working with VDU's and Computers

Long Exposure to computer screens can cause eyestrain, which in turn can cause Headaches, Nausea and Dizziness.

Here are a few simple precautions which can help protect you from eyestrain:

  1. Make Sure Lighting is adequate. i.e. If natural Lighting feels insufficient, be sure to have good ambient lighting from Above and slightly behind the Monitor, being sure to reduce the amount of glare and any reflections on the screen as much as possible.
  2. Use a filter on the Screen, not only does this improve contrast, but it also helps rude glare from the monitor.
  3. Take Regular breaks. If you have looking at a screen for more than 45 minutes, you should get up and take a break. Go for a cup of tea or coffee. This is good practice, as it gives your eyes a chance to focus on other things, allowing the muscles inside to stretch and relax.
  4. Have regular Sight tests, as occasionally ( especially people over 40) your normal distance or reading spectacles can be to strong or to weak, and a pair of intermediate spectacles may help take some of the work away from your eye muscles.


With an increasing number of people working with computers these days, opticians and doctors see far more people who are suffering from eyestrain and many people do not associate it with their work.

If you have not had an eye examination, and you work with computers or displays of any kind, then we highly recommend that you get your eyes tested as soon as possible.

In the UK, your employer is obliged to pay for a sight exam if you spend more than three hours a day using a computer or display, and if spectacles are needed for VDU or Computer work, then the company has to pay. We recommend that you talk to the Health and Safety Representative at your place of work.

Newer screens help reduce problems by having a higher refresh rate, this means the image is projected onto the screen at a higher frequency than was the case some years ago. Today the refresh rate of a modern monitor is between 70hz and 120hz ( a big improvement over the older models which used to project between 30 and 50 hz).

LCD screens may help too, as these screens do not use the same raster technology which causes a normal CRT (Cathode Ray Tube) Screen to flicker and cause problems.

Here is a quick link to Dixons website, where you can find out more about CRT and LED technology.

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