AIM:To observe the clinic characters of early stage of the Posner-Schlossman syndrome to aid the diagnosis.METHODS:Select 31 patients 31 eyes from 2004-06 to 2011-02 with Posner-Schlossman syndrome whose signs and symptoms can be observed in early stage in our hospital.Having got records within the first 24 hours and succedent two days,which include vision,hyperemia of the eyeball,corneal edema,keratic precipitates(KP),Dyndall’s sign,pupillary light reflex,intraocular pressure.Main symptoms and diagnosis of the day were recorded as well.RESULTS:Although all 31 patients could be diagnosed as Posne-Schlossman syndrome eventually,in the first 24 hours only 15 patients’(48%)diagnosis were Posner-Schlossman syndrome,in the succedent two days 23(74%) and 29 patients’(93%) diagnosis were Posner-Schlossman syndrome in sequence.CONCLUSION:Posner-Schlossman syndrome can be divided into three types clinically:typical Posner-Schlossman syndrome,KP type and high-intraocular-pressure type.The last two types are more difficult to diagnose in early stage.KP and distending feeling of the eyeball are important signs and symptoms.