Seohan Computerized Hue Test(2): Total Error Scores According to the Age in Normal Subjects and Total Error Scores and Central Cap in Color Defectives

PURPOSE: To evaluate the clinical usefulness and its own characteristic of Seohan computerized 85-hue test(SCHT-85) which was developed by authors. METHODS: SCHT-85 was performed in 89 normal subjects and 41 subjects with color defects diagnosed by Hardy-Rand-Rittler test(HRR test) and Farnsworth Munsell 100-hue test(FM 100-hue test) and total error scores(TES) according to the age in normal subjects and TES and central cap in subjects with color defects were determined. RESULTS: In normal subjects, TES of SCHT-85 according to the age were slightly higher than those of FM 100-hue test and highly correlated with those of FM 100-hue test. TES of SCHT-85 were increased according to the degree of abnormality in the HRR test in subjects with color defects. TES of SCHT-85 were lower than those of FM 100-hue test in normal subjects and higher than those of FM 100-hue test in subjects with color defects. In subjects with color defects, the central cap of SCHT-80 showed the tendency to yellowgreen-purple axis in protan and green-bluepurple axis in deutan compared to that of FM 100-hue test. CONCLUSIONS: SCHT-85 is highly correlated with FM 100-hue test and seems to be more useful to differentiate normal subjects and subjects with color defects than FM 100-hue test.

Seohan Computerized Hue Test 1: The Development of Computerized Color Vision Test and Pilot Study

Several tests have been used for assessing color vision but most of them are nonspecific, expensive, complicated or too time consuming to perform. We have developed a new computerized color vision test named Seohan computerized 85-hue test[SCHT/85]that has many advantages compared to Farnsworth Munsell[FM]100-hue test.SCHT/85 has 85 color caps which can be displayed based on a model of FM 100-hue test using Multimedia toolbook 4.0.Selected color caps in the lower random area can be moved and inserted to the upper result area by a mouse.At the end of the test, error scores and ring graph can be displayed in monitor and can be also printed out. Total 15 subjects performed with SCHT/85 and FM 100-hue test twice who have been showed 10 normal and 5 abnormal color vision reported with other color vision tests and the results of two tests were analysed to compare the total error scores[TES]and reproducibility. All ten normal subjects showed lower TES in SCHT/85 than FM 100-hue test and the mean TES were 31.5 and 43.6 with SCHT/85 and FM 100-hue test.The coefficients of variation [CV]were 4.3%and 22.7%with SCHT/85 and FM 100-hue test.The two tests were highly correlated[r=0.92].Five abnormal subjects showed higher TES in SCHT/85 than FM 100-hue test and the mean TES were 169.8 and 157.3 with SCHT/85 and FM 100-hue test.The coefficients of variation were 9.1%and 21.2%with SCHT/85 and FM 100-hue test.These two tests were also highly correlated[r=0.965]. In conclusion, SCHT/85 which was newly developed by authors is a highly useful test for color vision.