Color sense discrimination test was evaluated using Farnsworth Munsell 100-Hue test (Munsell FM 100, X-Rite, USA). Each patient arranged four trays of colored caps in hue order. There is a predetermined sequence for each tray. The closer the patient's arrangement is to the correct sequence, the better the patient's color sense discrimination. The Farnsworth-Munsell 100-Hue Test Scoring Software was used to score the results of Farnsworth-Munsell 100-Hue Test. The results are displayed in polar or linear format, and the total error score was recorded for calculation.