AIM:To analyze the clinical characteristics and risk factors of the old glaucoma,to explore the prevention and control measures. METHODS:Fifty-one cases (69 eyes) of confirmed glaucoma over age of 50 were given questionnaire investigation and analysis on the clinical characteristics and risk factors. RESULTS:Among 51 cases,acute angle-closure glaucoma had 21 cases (25 eyes, male 4 cases, 5 eyes, female 17 cases, 20 eyes),chronic angle-closure glaucoma had 17 cases (15 eyes, male 6 cases, 9 eyes, female 11 cases, 17 eyes),open angle glaucoma had 10 cases (15 eyes, male 6 cases, 9 eyes,female 4 cases, 6 eyes),secondary glaucoma had 3 cases(3eyes, male 2 cases, 2 eyes,female 1 case, 1 eye).21 cases (25 eyes) of acute angle-closure glaucoma had significantly incentives and symptoms.14 cases (22 eyes) of chronic angle-closure glaucoma and open angle glaucoma had mild symptoms, 1 case (2 eyes) of open angle glaucoma had night blindness and other symptoms,the others had no obvious symptoms.2 cases had obvious symptoms and 1 case had no obvious symptoms in secondary glaucoma.There were 11 cases with family history,39 cases with anatomical factors (shallow anterior chamber, narrow angle),21 cases with myopia and hyperopia,1 case of neovascular glaucoma caused by retinal vein occlusion,1 case of secondary glaucoma caused by intumescent stage cataract,1 case of corticosteroid-induced glaucoma caused by long-term using of dexamethasone eye drops. CONCLUSION:The old glaucoma have complicated causes and diverse clinical manifestations.Patients should be given appropriate health promotion to improve the congnitive ability of patients to disease,achieve early diagnosis,early treatment.