| RESULTS FOR THE COLORBLINDNESS TEST |
| Explanation of the Plates No. 1 Any subject, whether with normal or defective color vision will read correctly the figures "12". This plate is used mainly for preliminary explanation of the test process to the subjects. No. 2 Normal subjects will read "8" and those with red-green deficiencies "3". No. 3 Normal subjects will read "5" and those with deficiencies "2". No. 4 Normal subjects will read "29" and those with red-green deficiencies "70". No.5 Normal subjects will read "74" and those with red-green deficiencies "21" No. 6-7 correctly decipherable by normal subjects, but illegible or hard to read for those with red-green deficiencies. No. 8 Clearly "2" for normal subjects but obscure for those with red-green deficiencies. No. 9 Normal subjects can hardly read it, but most of those with red-green deficiencies see the figure "2" in it. No. 10 normal subjects can usually read the figures "16", but most of those with red-green deficiencies cannot. No. 11 In tracing the winding line between the two X's, the normal trace of the bluish-green line, but the majority of those with color vision deficiencies are unable to follow the line or follow a line different from the normal one. No. 12 Normal subjects and those with mild red-green deficiencies see the figures "35" but protanopia and strong protanomalia will read "5" only, and deuteranopia and strong deuteranomalia "3" only. No.13 Normal subjects and those with mild red-green deficiencies see the figure "96" but protanopia and strong protanomalia will read "6" only, and deuteranopia and strong deuteranomalia "9" only. No. 14 In tracing the winding lines between the two X's, the normal trace along the purple and red lines. In protanopia and strong protanomalia both lines are traced, and in case of mild protanomalia both lines are traced but the purple line is easier to follow. In deuteranopia and strong deuteranmalia both lines are traced and in case of mild deuteranmalia both lines are traced but the red line is easier to follow. Analysis of the result As assessment of the readings of plates 1 to 11 determines the normality or defectiveness of color vision. If 10 or more plates are read normally, the color vision is regarded as normal. If only 7 or less than 7 plates are read normal, the color vision is regarded as deficient. However, in reference to plate 9, only those who read the numerals 2 and read it easier than those on plate 8 are recorded as abnormal. It is rare to find a person whose recording of normal answers is 9 or 8 plates. An assessment of such a case requires the use of other color vision tests, including the anomaloscope. Care of the Plate It is important that the book of the test plate should be kept closed, except during use, because undue exposure to sunlight causes a fading of the color of the plates. Answers to each plate Number Normal Person with Red-Green Persons with Total Color of plate person Deficiencies Blindness and Weakness 1 12 12 12 2 8 3 x 3 5 2 x 4 29 70 x 5 74 21 x 6 7 x x 7 45 x x 8 2 x x 9 x 2 x 10 16 x x 11 Traceable x x PROTAN / DEUTAN Strong/Mild Strong/Mild 12 35 5 (3)5 3 3(5) 13 96 6 (9)6 9 9(6) 14 Can trace Purple Purple Red Red x The mark X shows that the plate cannot be read. The numerals and winding lines in parenthesis show that they can be read or traced but they are comparatively unclear. |