Computers and your eyes

To date, the overwhelming evidence is that there is no radiation risk from video display terminal (VDT)/cathode ray tube units and that it is concern about radiation risk that overwhelms the worker, along with other possible causes of physical discomfort or harm in this work situation. The presence in some workers of symptoms of ocular or general fatigue have become intermixed with an understandable concern about radiation, so that all disability or discomfort encountered is or tends to be blamed on radiation.

This situation is better understood now than it was even 3 or 4 years ago, but there is still much reluctance in the workplace to make adequate allowance for such factors as the sound background, the need for well-designed equipment, variety in tasks, good illumination and proper air exchange, and finally, the value of a good eye examination by an understanding examiner.

The situation regarding background radiation and radiation "hot spots" is less clear because the investigation of this aspect has not been consistent or thorough. However, this possible source of risk is more or less universal and therefore is not restricted to any group, such as VDT workers. It is hoped that there will be further monitoring of background radiation levels in all situations where there is any suggestion that there could be a hazard.

The ophthalmologist should be reasonably well informed about symptoms of visual difficulty, ocular fatigue and general fatigue that may relate to this type of work. The ophthalmologist should keep in mind Hans Selye's demonstrated relationship between stress and disease when helping to solve the patient's problem or when asked for advice by industry or by those interested in occupational health problems.