J Korean Ophthalmol Soc.  1977 Dec;18(4):297-298.

Evaluation of the Hahn's Pseudoisochromatic Plates

• Hahn CS

Abstract

72 subjects with defective color vision that was detected by the screening test among 633 high school students were examined using a printed sample of the author's plates and other 7 kinds of color tests including Ishihara's, Okuma's. Tokyo Medical College'sand H-R-R's plates, Farnsworth's Panel D-15 Test. Hahn's Double 15-Hue Test and Hahn's Color Choice Test (modified City University Colour Vision Test). Results of examination in classifying the types and estimating the extent of color defects using the author's plates were compared with the summarized final results obtained with 8 kinds of tests and the rate of coincidence of results both in type and in extent was found to be 33.3% in the author's plates, 37.5% in Okuma's, 36.1% in Tokyo Medical College's and 27.8% in H-R-R's plates.

MeSH Terms

Color Vision
Humans
Mass Screening