London Underground

The standards for train drivers, guards, and any other emergency or depot train driver, are as follows:

Visual Acuity with or without assistance      6/9      6/12

Minimum vision without assistance        6/60      6/60

Visual fields                              Full on confrontation

Near Vision                               N6 with or without glasses

Contact lenses are not permitted for train drivers or those required to undertake emergency train driving.

The spectacle frame should be of a design which does not impede peripheral vision.

LUL has approved the specification for certain types of sunglasses for wearing in bright conditions, which do not impede colour appreciation of signals, or "hi-vi", and other reflective protective wear worn by staff working on the track during these conditions.  No other sunglasses are permitted.

There should be no significant ophthalmological pathology, or any eye condition likely to cause sudden loss of vision.  A driver who suffers from a temporary eye condition will be required to attend for eyesight testing before returning to duty.

Full colour vision is required, and is tested by the Ishihara Plates (no more than three misreadings and no errors).