AIM:To observe the incidence of iris and ciliary body cysts in angle-closure glaucoma,and its relationship between anterior chamber depth and anterior chamber angle.METHODS:Ultrasound biomicroscopy(UBM)was used in 740 cases 1057 eyes with angle-closure glaucoma for anterior segment examination.RESULTS:Ciliary body cysts were detected in 42 cases 60 eyes among 740 cases 1057 eyes,accounting for 5.68% in the number of examined eyes.Among the iris and ciliary body cysts of 60 eyes,iris ciliary sulcus cysts were in 56 eyes(93.33%),ciliary crown cyst was in 4 eyes(6.67%);one single cyst was in 33 eyes(55.00%),multiple cysts were in 27 eyes(45.00%).Anterior chamber axis depth in patients with no associated ciliary body cysts was 1.16-2.37mm,an average of 1.843mm;anterior chamber axis depth in patients with iris and ciliary body cyst was 1.67-2.78mm,an average of 2.297mm.Angle adhesion rate of more than two quadrants in patients with angle-closure glaucoma associated with and not associated with ciliary body cysts were 66.67% and 44.59% respectively.CONCLUSION:The ciliary body cysts in angle-closure glaucoma have a higher prevalence,mostly iris cyst in the ciliary sulcus,and have little effect on anterior chamber axis depth,but can increase the adhesion angle range,cause angle-closure glaucoma.