OBJECTIVE: To determine whether colour blindness affects batting in professional 
cricketers.
DESIGN: Comparison of batting averages of colour blind cricketers and those with 
normal vision.
SETTING: Players on 18 first class county cricket teams.
SUBJECTS: 280 of 306 players were tested.
MAIN OUTCOME MEASURES: Results of Isihara colour blindness tests.
RESULTS: Batting average for the colour blind group (12 players) was slightly 
lower than for players with normal vision (20.88 v 26.31). There was no 
difference in the number of batsmen and bowlers affected. Batting averages 
before and after the introduction of the white ball into Sunday League cricket 
did not differ significantly.
CONCLUSIONS: That batting performance is not significantly impaired by colour 
blindness suggests that to some extent these players are self selected. Routine 
testing of cricketers for colour blindness is not recommended.