Test Farnswortha-Munsella 100-Hue. Cz. II – procedura badania i analiza wyników
Test Farnsworth-unsell 100-Hue Test. Part II – Test Performing Method and Results Analysis
Justyna Wosik1, Jacek Pniewski1, Anna M. Ambroziak1,2,3
1 Wydział Fizyki Uniwersytetu Warszawskiego
Dziekan: prof. dr hab. Teresa Rząca-Urban
2 Samodzielny Publiczny Kliniczny Szpital Okulistyczny w Warszawie
Kierownik: prof. dr hab. n. med. Jerzy Szaflik
3 Zakład Optyki Informacyjnej Instytutu Geofizyki Wydziału Fizyki Uniwersytetu Warszawskiego
Kierownik: dr hab. Rafał Kotyński
Summary: The Farnsworth-Munsell 100-Hue test (F-M 100-Hue test) is a very complex colour vision test. The examination must be performed in proper and stable conditions. The type of illumination to conduct the F-M 100-Hue test is illuminant C or D65 and the light should be intense. Refractive correction is also necessary during the examination, because refractive blur might worsen the results and extend the time of performing the test. It is also important to decide whether the examination should be monocular or binocular. Monocular response will provide more information about each eye separately, especially when the patient has acquired colour vision defect, which is not symmetrical. The patient cannot see properly arranged caps before the examination. The cases with caps might be performed in random order. The person performing the test ought to show the anchor caps in each case, and then ask the patient for arranging others caps in order according to the colour. The time to complete arranging one case is 2 minutes, but if it is not enough, patient might continue until he or she finishes it. Results of the test should be recorded on a special data sheet. Then Total Error Score (TES) ought to be calculated and a pattern of error distribution ought to be drawn. There are many mathematical methods of assessing F-M 100-Hue test results. A good way to determine severity of colour vision defect, orientation of the axis and degree of bipolarity is application of the Fourier analysis of the error scores for the individual caps, but it is quite complicated. Easier way to assess the test is fitting a sine wave to the error distribution. The statistically determined total test scores and patterns of error distribution for typical colour vision anomalies could be helpful in diagnosis. However the interpretation of the examination results is difficult and requires experience from the person performing the test. It is needed to take under consideration that the patients learn, how to perform the test, so each subsequent test score should be better. The psychology of the patient and conditions of examination also have impact on results. However the Farnsworth-Munsell 100-Hue test might provide much more information about patients than other colour vision tests.
Słowa kluczowe: test Farnswortha-Munsella 100-Hue, widzenie barwne, zaburzenia widzenia barwnego.
Keywords: Farnsworth-Munsell 100-Hue test, colour vision, colour vision anomalies.