1983 Volume 25 Issue 12 Pages 1937-1941_1
Detailed examination of minute pathological changes is necessary for the accurate evaluation during gastrofiberscopy. Various methods employing dye spray techniques have been developed but the possibility of harm to the human body caused by these methods cannot be denied and the procedares are very troublesome. It is also important to take into account the fading of human color sensitivity that is particularly noticeable as a result of continuous gazing at reddish colors. We found that results compatible with those of the dye spray techniques could be obtained by the use of suitable filters and that these were effective in mitigating the fading of color sensitivity.
