Nourishes kidney yin, replenishes liver blood and yin, benefits the eyes. It modified to relieve vision problems due to deficiency of kidney yin or qi. Symptoms include blurry vision, dry and painful eyes, pressure behind the eyes, and poor night vision. Also applicable for dizziness, headaches, pain behind eyes, outbursts of anger, heat in palms, restlessness and insomnia. Source: Xiao Er Yao Zheng Zhi Jue, (Pediatric Pharmaceutics), by Qian Yi, Song Dynasty, 960-1279. Function: Nourish liver and kidney yin, nourish eyes; strengthen vision Application: Use to relieve def. liver and kidney yin syndrome especially with dryness in the eyes and poor vision: Symptoms: Dizziness, vertigo, tinnitus, dryness in the eyes, poor vision.