I have been asked by DVLA to have a field vision test and they have given me the choice of Specsavers branches to contact. Both have different equipment. I am wondering what the difference is between the Zeiss HFA3 830 and the Humphry740i.
(I have had field vision tests at my opticians but can never see the dark lines that flash up. I do however prefer the equipment that uses the flashing lights method as at our Community Eye Care centres).