Sokol J, Stegman Z, Liebmann J M, Ritch R
Glaucoma Service, The New York Eye and Ear Infirmary, New York 10003, USA.
Ophthalmology. 1996 Feb;103(2):289-93. doi: 10.1016/s0161-6420(96)30702-1.
To evaluate the position of the iris insertion into the ciliary body in persons with pigment dispersion syndrome (PDS) and control subjects.
Ultrasound biomicroscopy was performed on 19 eyes with PDS and on 21 eyes of control subjects. A radial, perpendicular image in the temporal meridian detailing Schwalbe line (SL), scleral spur (SS), and iris root insertion (IR) was obtained for each eye by a single examiner. The distances between these structures then was measured.
There were no differences between the groups in refractive error (mean +/- standard error, -2.8 +/- 0.7 diopters for PDS eyes versus -2.2 +/- 0.6 for control subjects) (P=0.46), sex distribution (P=0.49), and trabecular meshwork height (SL to SS) (0.63 +/- 0.03 mm [PDS eyes] versus 0.59 +/- 0.03 [control eyes]; P = 0.24). The SS-to-IR distance was significantly greater in PDS eyes (0.04 +/- 0.04 mm) than in control eyes (0.28 +/- 0.04 mm) (P=0.01) as was the overall distance from SL to IR (0.98 +/- 0.04 mm versus +/- 0.04 mm) (P = 0.003).
The insertion of the iris into the ciliary body is more posterior in PDS eyes than in control eyes. This anatomic variation places the iris pigment epithelium proximal to the zonular apparatus and may increase the likelihood of iridozonular contact and zonular pigment dispersion.
评估色素播散综合征（PDS）患者及对照者虹膜睫状体附着位置。
对19只患PDS的眼睛和21只对照者的眼睛进行超声生物显微镜检查。由一名检查者为每只眼睛获取颞侧子午线方向的径向垂直图像，详细显示施瓦贝线（SL）、巩膜突（SS）和虹膜根部附着（IR）。然后测量这些结构之间的距离。
两组在屈光不正（平均±标准误，PDS组眼睛为-2.8±0.7屈光度，对照组为-2.2±0.6屈光度）（P = 0.46）、性别分布（P = 0.49）和小梁网高度（SL至SS）（PDS组眼睛为0.63±0.03mm，对照组眼睛为0.59±0.03mm；P = 0.24）方面无差异。PDS组眼睛的SS至IR距离（0.04±0.04mm）显著大于对照组眼睛（0.28±0.04mm）（P = 0.01），SL至IR的总距离也是如此（分别为0.98±0.04mm和0.84±0.04mm）（P = 0.003）。
PDS组眼睛中虹膜在睫状体的附着位置比对照组眼睛更靠后。这种解剖变异使虹膜色素上皮靠近晶状体悬韧带装置，可能增加虹膜晶状体悬韧带接触和晶状体悬韧带色素播散的可能性。
