Cambridge taxi driver Mathivan Subramaniam (right) was just one of many cabbies tested at a mobile clinic set up recently by experts from Anglia Ruskin University's Department of Vision and Hearing Sciences.
Dr Keziah Latham, Dr Sheila Rae and Liam Kite tested drivers as part of a research project by the department which will compare the standard letter charts used by optometrists to the number plate recognition test.
Dr Latham, a senior lecturer in optometry and ophthalmic dispensing, said: 'We would like to thank the drivers for their cooperation. The licensing officers were pleased to hear that the standard of vision of the taxi drivers we tested was very good.'