June/July 2013 (vol. 10/1)

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Colour-vision safety on track

Safer and fairer colour vision testing at London Underground


Conventional colour assessment tests, such as Ishihara plates, have high sensitivity, but fail to quantify accurately the severity of colour vision loss and cannot be used to determine exactly who does, and does not, have the required level of colour vision for safety-critical work. New technology, originally developed for air traffic safety, has now been introduced by Transport for London to assess its underground train drivers. John Ballard reports.  

FOR most jobs colour perception is not a …    

John Ballard is editor of Occupational Health [at Work].

Author: Ballard J


Occupational Health at Work June/July 2013 (vol. 10/1) pp20-23

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