I can­’t ima­gine why bowl­ers would be too badly effected, but bat­ting and field­ing could prove more dif­fi­cult. With a sight-screen any dif­fi­culties should be reduced, and a lot of catches in the field have the sky as a back­drop, but there will still be occa­sions where the ball must be more dif­fi­cult to pick out. So, are many of the play­ers at the highest level col­our-blind? It appears that the Aus­trali­ans have ungishaye kuso, and already done the hard graft to provide an answer to this ques­tion. The con­clu­sion: at most levels col­our-blind people are rep­res­en­ted in line with their num­ber in the pop­u­la­tion (azungeze 10%), but at the very highest levels there are almost no col­our-blind people at all (Bill Ponsford may be an excep­tion to the rule. This Aus­sie legend played 29 test matches at an aver­age of 48). It seems that at the very highest levels being col­our-blind is a sig­ni­fic­ant imped­i­ment. At all levels, play­ers with col­our-blind­ness found it dif­fi­cult to see the ball across the grass and ten­ded to avoid mid and deep field­ing pos­i­tions — cap­tains take note! Oth­er stud­ies have shown that col­our-blind bats­men are not sig­ni­fic­antly affected, for example hav­ing an aver­age play­ing with a white ball no dif­fer­ent from their aver­age with the red ball.