To determine whether you have color deficiency, you can use pseudo-simultaneous color chart examination, color phase arrangement examination, color vision realm examination and other methods to test. 1. False Homochromatic Chart: False Homochromatic Chart refers to a specific image or figure composed of several groups of dots with the same color and different brightness, or dots with different colors and the same brightness, which is recognized by the examiner under normal light and at a specific distance, and most of them will be considered as color weakness if the time is more than 5 seconds, while those who can’t recognize it at all will be considered as color blindness. 2. Hue alignment test: Hue alignment test uses objects with the same shape and size but different colors for the examiner to distinguish, if the examiner can’t distinguish them, he/she may have color weakness or color blindness. 3. Color vision goggle examination: the examiner wears special goggles, the doctor will let the patient to adjust the ratio of red light and green light, adjust to the circle all show the same color and brightness until, if the adjustment can not be possible, may be color weakness or color blindness. It is recommended that patients with color blindness or color weakness consult a doctor in time to assess their condition, and under the guidance of the doctor for treatment.