Colour deficient vision should not prevent a career in histopathology

EDITOR- Poole et al report that histopathologists with colour deficient vision make more errors in the identification of slides stained by colour dependent methods, such as Ziehl-Neelsen, than those with normal colour vision. 1 However, the authors do not indicate how many of the 15 histopathologists with colour deficient vision were already aware of their limitations, whether "don'tknow" was accepted as an answer in the slide identification study,and if so whether this was reported as an error.