[Changes in color differentiation using the 100-Hue Test. II. The score for basic colors of the spectrum in relation to age].

The author investigated changes of colour sensitivity of red, green and blue, using the FM 100-hue test. For examination healthy subjects without hypertension and diabetes and with a normal ophthalmological finding and normal functions were selected. In six age groups (21-80 years) 240 male and female eyes were examined. In the youngest age group there was greatest proportion of errors in the blue area, less in the green area and the least in the red area. A more detailed analysis revealed that the greatest rate of errors was in the blue-green area. With advancing age the number of errors in the areas of the basic colours increase and at the same time differences between differentiation of red, green and blue decrease. In the age group above 71 years no differences were found in the score of errors in the area of basic colour.