Bauhaus-Universität Weimar

Titel:
Chapter XIX. Holmgren's Method of Testing.- Examination and Diagnosis
Person:
Jeffries, Benjamin Joy
PURL:
https://digitalesammlungen.uni-weimar.de/viewer/image/lit38628/1/
196 
COLOR-BLINDNESS : 
CHAPTER XIX. 
holmgren’s method op testing. — examina¬ 
tion AND DIAGNOSIS. 
Justice to Professor Holmgren demands that I 
should here explain what he has done in reference 
to these various forms or methods of testing for 
color-hlindness, and the study of color-sense. He 
has been over the whole subject before the recent 
observers I have mentioned, who have attached 
their names to this or that special modification. 
His method of examination with the worsteds:— 
to be given in his own words in this chapter — is 
therefore to be considered as a natural develop¬ 
ment of his special studies. 
March 31, 1871, he published his views on 
“ Color-Blindness and the Young-Helmholtz Theory 
of Color.”1 He there discussed this theory, and 
the methods heretofore used in testing color-blind¬ 
ness. He also gave the explanation of the peri¬ 
metric examinations afterwards carried out by him. 
By experiments with Maxwell’s rotating disk he 
found the true difference between red and green 
1 Om Fiirgblindhet och den Young-Helmlioltz’ska Färgtheo- 
rien, 1871.
        

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