Tonifies qi and generates body fluids, nourishes the liver and kidneys, and unblocks meridians to improve eyesight. Used for type 2 diabetic retinopathy simple type, with TCM syndrome differentiation of qi and yin deficiency, liver and kidney deficiency, and eye meridian blood stasis, symptoms include blurred vision, dry eyes, fatigue, five heart heat, spontaneous sweating, night sweats, thirst, preference for drinking, constipation, back and knee soreness, dizziness, and tinnitus.