The article by Reiss et al,1 while a much-needed addition to the areas of history taking and patient compliance, neglected an important group: health care workers. Many health care workers, including 50% of those in Reiss and colleagues' study, are color blind. It is important for them to know this so that they can make the appropriate adjustments in their practices. If they are not certain, especially if they have difficulty appreciating that the green traffic light is not white or seeing the red light at all during the day, they can have their color vision quickly and painlessly checked by any ophthalmologist.
Iserson KV. Color Blindness and Health Care Personnel. Arch Intern Med. 2001;161(18):2265-2266. doi: