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Visual display units.

The suggestion that cataracts or other organic damage can result from exposure to radiation from visual display units (VDUs) is not supported by the best currently available epidemiological and experimental evidence. Eyestrain is common among VDU operators but is usually due to factors in the office environment, rather than defects in vision. Visual screening tests for operators should be simple, and tests for extraocular muscle balance and colour vision are not recommended.