Optical allusions

SIR – I note that Suffolk council (report, August 14) is no longer going to refer to cat’s eyes in case it confuses tourists. May I suggest they ban hard shoulder for the same reason? Gordon Macniven

London SW17

SIR – For years the thought of a one-eyed hawk having to watch endless tennis matches has upset me, as has the idea that players should throw their darts into a bull’s eye. Jill Girling

Felmersham, Bedfordshire