Shihu Yeguang Wan
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Shihu Yeguang Wan (Chinese: 石斛夜光丸) is a brownish-black pill used in traditional Chinese medicine to "replenish yin of the kidney, quench liver-fire and improve eyesight".[1] 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".[2]