As Dr Catharine Chisholm told BCLA members and guests in her Presidential Address, 'Life in the fast lane: contact lenses and driving', contact lens wearers are also seen more regularly in practice. In theory, she argued, they should be wearing a more up to date Rx and therefore see better than spectacle wearers.
But buying lenses over the internet or neglecting to bring their spectacles up to date could leave contact lens wearers below the required standard. Practitioners, too, might compromise vision in favour of cost or convenience, especially when fitting lenses for occasional or sports use. Uncorrected astigmatism was a particular problem, with an average loss of acuity of 1.5 lines per dioptre.
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