I believe the answer is: color-deficient vision
color-deficient vision refers to the inability of our eyesight to distinguish complete set of colors. this deficiency could be caused by either injury to the photoreceptor in the retina or could be caused by genetic factors that inherited ever since the patient was born.
At the optometrist's office, Andre failed to distinguish numbers on the color designs shown to him. Andre most likely has color-deficient vision.
