This free color vision test online will determine if you have color blindness or any deficiency in your eyesight. The test is designed to evaluate the quality of your eyesight. Even though this test can be very accurate, it should never be used to replace a doctor’s visit. Results of this test have been found to be 100% reliable. Please be aware that color vision can deteriorate over your lifetime. It is important to test yourself often. Your score will determine your results. Look at the circle on the left and enter the number you see in the box provided.