Shihu Yeguang Wan () is a brownish-black pill used in traditional Chinese medicine to "replenish yin of the kidney, quench liver-fire and improve eyesight".State Pharmacopoeia Commission of the PRC (2005). "Pharmacopoeia of The People's Republic of China (Volume I)". Chemical Industry Press. . It tastes sweet and slightly bitter. It is used where there is "deficiency of yin of the liver and the kidney with rousing of fire causing cataract with impaired vision".Zuo Yanfu, Zhu Zhongbao, Huang Yuezhong, Tao Jinweng, Li Zhaoguo. "Science of Prescriptions", Publishing House of Shanghai University of Traditional Chinese Medicine. 2002. .
See also Chinese classic herbal formula Bu Zhong Yi Qi Wan
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