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Older drivers with failing eyesight can pose a serious hazard. A team of
researchers at the University of Alabama, Birmingham, studied 294 drivers aged
55 to 87 years. Drivers whose useful field of view was reduced by 40 per cent or
more—a condition that afflicts up to third of this age group—were
2.2 times as likely to crash during the three-year study (The Journal of the
American Medical Association, vol 279, p 1083).