Centre for Applied Vision Research
  1. Visual Neuroscience and Psychophysics
  2. Ocular Optics and Instrumentation
  3. Ophthalmic Assessments and Patient Outcomes following Ophthalmic Interventions
  4. Visual Development and Plasticity
  5. Ophthalmic Public Health
  6. Measurement Techniques in Vision
  1. Research & Case Studies
Vision

London Underground Driver testing

Based on the results of this study, TfL designed a colour assessment protocol based exclusively on the CAD test. The new approach to colour assessment ensures that up to a third of people who would have previously been prevented from working as train drivers are now passed fit.

At TfL, the safety critical part of a train driver’s assessment is red/green vision – a number of coloured light signals of well-defined spectral composition are involved. Blue/yellow vision is also important and is part of the assessment to check for eye health.

A detailed description of how the CAD test is used in the TfL environment is given in an article written by John Ballard (Editor, Occupational Health at Work Journal).

Read John Ballard's article about the use of CAD in the TfL environment.

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