Objective:To evaluate the effective way to lower the intraocular pressure(IOP) in the sudden attack of angle closure glaucoma.Methods:The treatment and effects of 105 patients suffering the sudden attack of angle closure glaucoma from June of 2001 to June of 2006 in my hospital were analyzed retrospectively.Result:62 eyes underwent therapy of medcine.There were 32 eyes of effective cure

with rate of 51.6%.43 eyes underwent therapy of anterior chamber penetration.There were 31 eyes of effective cure

with rate of 72.1%.There were significant differences between the two groups(χ2=4.43

P<0.05).Conclusion:Anterior chamber penetration reduced the high intraocular pressure more quickly and more effectively than medcine.Penetration can lighten the hard damage on optic nerve caused by high IOP and can make the favorable condition for the following operation which the patients may need.Therefore this kind of patients can take direct anterior chanber penetration.