Abstract:Background: Qin Bing eye drop is prepared with cortex fraxini and borneol. It has been commonly used to relieve the symptoms of photokeratoconjunctivitis (PKC), chronic conjunctivitis and keratitis for more than forty years. However, the origins of cortex fraxini are various, which may result in the unstable quality. Methods: The animal model of PKC was established using rabbit's eyes exposure to Ultraviolet (UV); levofloxaxin drop, normal saline, Qin Bing eye drops made of herbs from Hebei province and Shanxi… Show more
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