急性原发性房角关闭对侧眼激光周边虹膜切除术后接触性房角关闭的研究

目的了解急性原发性房角关闭（APAC）对侧眼激光周边虹膜切除术（LPI）后接触性房角关闭的发生率和眼部解剖特征。方法前瞻性研究。选择54例APAC对侧眼没有虹膜前黏连（PAS）的患者作为研究对象,平均年龄（67．1±7．2）岁（54—83岁）。采用超声生物显微镜（UBM）在暗环境下观察LPI后是否发生接触性房角关闭．并比较发生接触性房角关闭与不发生接触性房角关闭患眼的眼压、房角及各项UBM参数,包括房角开放距离。（AOD跏）、房角隐窝面积,。（ARA750）、小梁虹膜夹角（T—I角）、小梁睫状体距离（TCPD）、周边虹膜厚度（IT1）、虹膜悬韧带距离（IZD）、虹膜根部附着位置、中央前房深度（ACD）。对两组数据采用独立样本t检验及两样本秩和检验进行分析。结果LPI后暗环境下UBM检查至少一个象限发生接触性房角关闭的有20例,占37％。反映房角开放程度的指标（AOD500、ARA750、T-I角）和反映睫状体位置的指标（TCPD）：接触性房角关闭（＋）组小于（-）组（t=11．741、11．089、12．175、4．349,P均〈0．01）;反映虹膜形态和位置的指标IT1：接触性房角关闭（＋）组大于（-）组（t=-3．300,P=0．002）;IZD、虹膜根部附着位置及ACD比较,两组差异无统计学意义（t=-1．880,P=0．066;Z=-1．423,P=0．155;t=0．072,P=0．942）。结论APAC对侧眼LPI后在暗环境下仍有一定比例发生接触性房角关闭,房角窄、睫状体前位、周边虹膜厚是LPI后发生接触性房角关闭的解剖学特点,提示LPI后具有这些解剖特点的APAC患者有可能进展为慢性房角关闭。     

Patency of superior ciliary sulcus in aphakic silicone oil-filled eyes: an ultrasound biomicroscopy study

Objective: To assess the patency of the superior ciliary sulcus in aphakic silicone oil-filled eyes by ultrasound biomicroscopy (UBM).Design: Prospective interventional series.Participants: Twelve eyes of 12 patients were included in this study.Methods: Twelve aphakic silicone oil-filled eyes were evaluated using UBM. The UBM examination of the anterior segment was performed using the Humphrey Instruments UBM equipped with a high-frequency (50 MHz), high-resolution (50 mm) transducer. The patients were placed in a semisitting position in which their backs were inclined to a suitable angle (about 50°). They were also asked to look straight ahead, to bring the superior ciliary sulcus to the highest point of the globe. The probe approached the patients' eyes superiorly at a slight angle (about 10°). Images of the superior ciliary sulcus were captured and analyzed.Results: The UBM images demonstrated an intact curved aqueous-silicone oil interface that appeared at some distance from and not filling the ciliary sulcus. A patent superior ciliary sulcus was thus found in all patients, even in those with a widely opened ciliary sulcus.Conclusions: The superior ciliary sulcus maintained its patency in aphakic silicone oil-filled eyes. These findings indicate that an iridectomy in a superior position may also be effective, although this has not been tested clinically in this report.     

明暗光线下超声活体显微镜检查在发现前房角关闭中的作用

目的 探讨明、暗光线下超声活体显微镜(UBM)检杳在发现前房角关闭中的作用.方法 系列病例研究.选择50岁及以上的浅前房和具有解剖的窄前房角人群作为研究对象.应用Van Herick法对受检人群进行周边前房深度检杳,对其中周边前房深度≤1/3角膜厚度者进行前房角镜检查,确定是否为解剖的窄前房角者.对解剖的窄前房角患眼进行明、暗光线下UBM检查,分别观察受检眼上方、颞上方、颞侧、颞下方、下方、鼻下方、鼻侧和鼻上方8个检查部位有无前房角关闭,评估具有解剖的窄前房角患眼前房角关闭率.从UBM图像中测量前房角开放距离.应用SPSS 12.0统计软件包,对研究数据进行分析.明、暗光线下前房角关闭率比较采用配对X2检验,前房角开放距离的比较采用Wilcoxon检验,以P<0.05作为差异有统计学意义.结果 符合入选条件的共有194例(379只眼)患者.以受检眼计算,在明、暗光线下UBM检杏发现的前房角关闭率分别为26.1%和69.7%,显示暗光线下前房角关闭率明显增高,两者间差异有统计学意义(X2=159.148,P=0.000).明、暗光线下均以上方的前房角关闭率最高,分别为21.4%和58.6%.周边前房深度越浅,前房角关闭率越高.周边前房深度<1/4角膜厚度眼在暗光线下前房角关闭率高达98.3%.在明或暗光线下,上、下、鼻、颞4个象限之间前房角开放距离的差异均有统计学意义(Z=-7.471,-15.407,-16.237,-16.782;P=0.000).上方象限前房角开放距离最小,前房角关闭率最高.结论 周边前房越浅,明、暗光线下前房角关闭率越高.明、暗光线下UBM检查是在临床和大规模人群中早期发现前房角关闭的有效和可行方法.(中华眼科杂志,2009,45:8-13)     

超声生物显微镜暗室激发试验

目的 比较超声生物显微镜（ＵＢＭ）暗室激发试验与传统暗室激发试验在闭角型青光眼筛选中的应用价值。方法 选择２２例（２２只眼）先兆期闭角型青光眼作为患者组,１５例（３０只眼）深前房正常者作为对照组,分别进行传统暗室试验和ＵＢＭ暗室试验。比较两种暗室试验前后房角的变化与眼压差,采用统计学χ＾２检验比较两者的阳性率。结果 两种暗室试验结果显示,闭角型青光眼组２２只眼中,１０只眼试验前后眼压差〉１．０７ｋ     

根据超声生物显微镜和眼前节OCT图像对房角关闭机制进行分型的一致性研究

背景 房角关闭是引起原发性房角关闭性疾病(PACD)的病理基础,了解不同类型的房角关闭机制对于PACD的危险因素评估、预防及诊治有重要意义.临床多采用超声生物显微镜(UBM)对房角关闭机制进行分型,但该检查为接触性,在使用中具有一定的局限性.眼前节OCT(AS-OCT)是一种非接触性的眼前节成像方法,能够对房角结构进行定性和定量评估. 目的 探讨根据UBM图像和AS-OCT图像对中国PACD患者房角关闭机制进行分型的一致性.方法 采用横断面研究.纳入2013年9-10月在北京同仁医院就诊并接受UBM和AS-OCT检查的PACD患者.UBM检查采集每眼上方、下方、鼻侧和颞侧4个方位的眼前节图像,AS-OCT检查采取四线扫描模式(包括0°～ 180°、45°～225°、90°～ 270°和135°～315°)对眼前节进行成像.根据UBM图像和AS-OCT图像分别进行房角关闭机制分型,并分为瞳孔阻滞型、睫状体前位型和周边虹膜肥厚型.每例受检眼的4张UBM图像及4张AS-OCT图像中分别至少2张显示相同的房角关闭机制分型作为该眼的UBM及AS-OCT分型.纳入符合标准的患眼,若双眼均符合标准则纳入右眼.用Kappa系数评估AS-OCT和UBM 2种方法对房角关闭机制分型结果的一致性.结果 最终纳入PACD患者40例40眼,其中右眼27眼,左眼13眼.根据UBM图像及房角关闭机制的分型标准,瞳孔阻滞型12眼,占30.0％;睫状体前位型23眼,占57.5％;周边虹膜肥厚型5眼,占12.5％.根据AS-OCT图像及房角关闭机制的分型标准,瞳孔阻滞型为12眼,占30.0％.睫状体前位型21眼,占52.5％;周边虹膜肥厚型7眼,占17.5％.两种房角关闭机制分型方法间的Kappa值为0.872,即高度一致. 结论 成功建立了根据AS-OCT图像对中国PACD患者房角关闭机制分型的标准,根据AS-OCT图像和UBM图像对房角关闭机制进行分型的判断结果高度一致.     

Ultrasound Biomicroscopic Dark Room Provocative Test

Purpose : To compare the clinical application value of Ultrasound biomicrsocpic dark room provocative test with the traditional dark room test in screening primary angle closure glaucoma (PACG).Methods: 22 eyes with PACG in prodromal stage and 30 eyes with deep anterior chamber and wide angle of 15 normal persons were observed in this trail. All 52 eyes were performed traditional dark room provocative test and ultrasound biomicorosopic darkroom test respectively. With different positive diagnostic criteria, the sensitivity of the two methods were compared using chi-squared analysis.Results : After staying in the dark room for 2 hours, In case group, IOP in 10 of 22 eyes rose more than 1. 07kPa(1kPa = 7.5mmHg), in 12 eyes less than 1.07kPa or had no changes; appositional angle closure were found by Goldmann gonioscopy in 8 eyes : 3 eyes in two quadrants, 5 eyes in more than two quadrants; the appositional angle closure was found by UBM in 15 eyes; 3 eyes in one quadrants, 5 eyes in two quadrants, 7 eyes     

Ultrasound biomicroscopic dimensions of the anterior chamber in angle-closure glaucoma patients

In order to evaluate the morphologic types of appositional angle-closure glaucoma, biometric measurements were made in angle-closure glaucoma patients using Ultrasound biomicroscopy (UBM). Twenty-six patients with primary angle-closure glaucoma and 21 cataract patients with as a control group were examined. The angle-closure glaucomatous eyes were classified as type B in which the angle closure started at the bottom of the angle and type S in which the angle closure occurred in the vicinity of Schwalbe's line. The trabecular-ciliary process distance (TCPD, type B; 873.20+/-86.77 microm, type S; 832.52+/-82.96 microm, control; 1233.50+/-73.01 microm, p = 0.000) and the angle opening distance (AOD500, type B; 89.75+/-63.27 microm, type S; 88.85+/-72.95 microm, control; 304.40+/-104.30 microm, p = 0.000) were significantly shorter in patients with angle closure vice control group. No significant difference were noted in the three groups of patients in regards to iris thickness or ciliary process-iris angle. In this study, we have demonstrated that there are two types of appositional angle-closure and have shown the forward rotation of the ciliary process without changes of the ciliary process-iris angle in cases of angle-closure glaucoma.     

Peripheral anterior synechiae and ultrasound biomicroscopic parameters in angle-closure glaucoma suspects

PURPOSE: To investigate the correlation between peripheral anterior synechia (PAS) and the quantitative anterior chamber angle parameters measured by ultrasound microscopy (UBM) in angle-closure glaucoma suspect (ACGS) eyes. METHODS: Eyes were defined ACGS as having occludable angles and intraocular pressure less than 21 mm Hg without glaucomatous optic nerve head. The gonioscopic criteria for ACGS were the trabecular meshwork invisible in 3 or more quadrants of the entire angle and the angular width less than 20 degrees by Shaffer classification. Twenty-seven eyes of 20 patients underwent anterior chamber angle and ciliary body imaging with UBM. Angle opening distance (AOD(500)), angle recess area (ARA), trabecular-ciliary process distance (TCPD) and trabecular-iris angle (TIA) were measured from the UBM images at each quadrant. RESULTS: The AOD(500), ARA, and TIA were not significantly different between the eyes with PAS (9 eyes) and without PAS (18 eyes) at each quadrant. However, the TCPD was significantly shorter in the superior quadrant when compared with the eyes without PAS (mean: 405.3+/-70.9 microm vs 536.4+/-140.5 microm) (p<0.05). CONCLUSIONS: The results suggest that the shorter distance from trabecular meshwork to ciliary body or the anterior placement of ciliary process may play a role in the development of PAS in ACGS eyes.     

闭角型青光眼中睫状体囊肿的检测

目的 探讨睫状体囊肿与闭角型青光眼的关系.方法 用超声生物显微镜(UBM)对260例(260只眼)连续闭角型青光眼患者进行眼前段检查.结果 在260只连续检查的闭角型青光眼中有睫状体囊肿的20只眼(7.69%)共22个囊肿,其中单发性囊肿的有18只眼(90%),多发性囊肿的有2只眼(10%).囊肿分布颞侧9个(41%),下方9个(41%),鼻侧2个(9%),上方2个(9%).在22个囊肿中有13个囊肿其所对应处房角关闭,9个囊肿其所对应处房角未关闭,卡方检验P=0.394.结论 睫状体囊肿在闭角型青光眼中的发生率较高的.而且他们分布的位置多在颞侧和下方.     

Ultrasound biomicroscopic imaging demonstrate thinner ciliary body thickness in eyes with angle closure

AIM: To compare the ciliary body thickness between eyes with primary angle closure (PAC) and primary angle-closure glaucoma (PACG) with the normal eyes, and to investigate the association between ciliary body thickness and ciliary processes situation. METHODS: In this cross-sectional study, 57 patients with PAC/PACG were matched to 57 normal subjects after propensity score matching (PSM) adjusting for age and gender. All subjects underwent conventional ocular examinations and ultrasound biomicroscopy (UBM) examination, among which the patients with PAC/PACG performed the examinations one month after laser peripheral iridotomy (LPI). Quantitative parameters were measured, which included ciliary body thickness at the position of 1 mm posterior to the scleral spur (CBT1), trabecular-ciliary process distance (TCPD) and trabecular-ciliary process angle (TCA). RESULTS: Eyes with PAC/PACG presented significantly thinner CBT1, shorter TCPD and smaller TCA (P<0.001) than the normal eyes, both in comparison of the means of four quadrants and in comparisons of each quadrant. After removing images with peripheral anterior synechia (PAS), the same results were also found in comparisons between the two groups. Significant correlations were found between TCPD (R2=0.537, P<0.001) and TCA (R2=0.517, P<0.001) with CBT1. CONCLUSION: Eyes with PAC/PACG have thinner ciliary body thickness and more anteriorly situated ciliary processes. Thinner ciliary body thickness is associated with anterior situation of the ciliary processes.     

闭角型青光眼中虹膜睫状体囊肿的发病情况

目的:观察闭角型青光眼中虹膜睫状体囊肿的发病情况,虹膜睫状体囊肿与前房轴深、房角的关系。方法:利用超声生物显微镜(UBM)对闭角型青光眼患者740例1057眼进行眼前节检查。结果:闭角型青光眼740例1057眼中检出合并虹膜睫状体囊肿者42例60眼,占被检眼数的5.68%。60眼虹膜睫状体囊肿中虹膜睫状沟囊肿56眼(93.33%),睫状冠囊肿4眼(6.67%);其中单发囊肿33眼(55.00%),多发囊肿27眼(45.00%)。不伴有虹膜睫状体囊肿的患者前房轴深1.16～2.37(平均1.843)mm;合并有虹膜睫状体囊肿的患者前房轴深1.67～2.78(平均2.297)mm。伴有及不伴有虹膜睫状体囊肿的闭角型青光眼患者房角粘连>2个象限的比率分别为66.67%和44.59%。结论:虹膜睫状体囊肿在闭角型青光眼中的发病率较高,多为虹膜睫状沟囊肿,对前房轴深影响不大,但可以增加房角粘连范围,引起闭角型青光眼。     

双轴线外部标记控制缝线人工晶状体定位精度的临床研究

目的　探讨双轴线外部标记技术在睫状沟缝线固定人工晶状体植入术中的定位效果。方法　无晶状体眼２７例（２７ 眼）接受经巩膜缝线固定人工晶状体植入术,双轴线外部标记技术控制两条子轴线:子轴线１:精确选定等距、对称的巩膜穿刺位点,使角膜中心点投影位于巩膜穿刺位点形成的固定轴线即子轴线１上;子轴线２:精确选定等距、对称的线襻结合位点,使人工晶状体光学中心点位于线襻结合位点形成的固定轴线即子轴线２上。术后随访６～２４个月,平均１０．８个月。通过测量人工晶状体光学中心点偏位度及超声生物显微镜（ｕｌｔｒａｓｏｕｎｄｂｉｏｍｉｃｒｏｓｃｏｐｅ,ＵＢＭ）全景测量固定位点轴向人工晶状体倾斜度和与固定位点轴向垂直的轴向人工晶状体偏转度判断人工晶状体位置精度,同时观察可能发生的并发症。结果　人工晶状体光学中心点与角膜中心点高度重合者２５眼（９２．６％）,偏离角膜中心点者２眼（７．４％）,偏位幅度为（０．２３±０．０４）ｍｍ;ＵＢＭ全景测量角巩膜缘２－８位点轴向人工晶状体倾斜度为（０．２０±０．０４）°;ＵＢＭ全景测量与角巩膜缘２－８位点轴向相垂直的１１－５轴向人工晶状体偏转度为（０．２４±０．０３）°;４眼（１４．８％）单襻位于位于睫状沟旁,６眼（２２．２％）双襻位于睫状沟旁,人工晶状体光学中心均保持居中;全部病例未发生人工晶状体缝线松解、人工晶状体脱位、角膜失代偿等并发症。结论　双轴线外部标记技术具有整体、直观、便捷的技术特征,具备精确控制缝线人工晶状体定位的可行性。     

Ultrasound biomicroscopic study of anterior segment changes after phacoemulsification and foldable intraocular lens implantation

PURPOSE: To report quantitative changes in the anterior segment configuration after clear corneal incision phacoemulsification and foldable intraocular lens (IOL) implantation by means of ultrasound biomicroscopy (UBM). DESIGN: Prospective, nonrandomized, comparative (self-controlled) trial. PARTICIPANTS: Twenty-one eyes of 19 patients with senile or presenile cataracts and no other ocular illness. METHODS: Patients were examined with UBM before and 1 and 3 months after surgery. At each UBM examination, axial images of the anterior chamber and radial sections of the angle at the superior, lateral, inferior, and medial quadrants were obtained. MAIN OUTCOME MEASURES: Central anterior chamber depth (ACD), iris-lens contact distance, iris-lens angle (ILA), angle opening distance at points 250 (AOD250) and 500 microm (AOD500) from the scleral spur, trabecular-iris angle (TIA), iris thickness 500 microm from the scleral spur (IT), trabecular-ciliary process distance (TCPD), iris-ciliary process distance (ICPD), iris-zonule distance, iris-sclera angle (ISA), and ciliary process-sclera angle (CPSA). After surgery, central anterior chamber depth was also measured from the cornea to the IOL (ACD) and from the cornea to the pupillary plane (ACD2). Each variable was measured twice in different days by the same observer. RESULTS: The variables IT, TCPD, ICPD, IZD, and CPSA did not significantly change after surgery (P > 0.01). Central anterior chamber depth increased approximately 30% after surgery (approximately 850 microm; P < 0.001), by both measurement methods used (ACD x ACD and ACD x ACD2). Anterior chamber angle significantly increased, by approximately 50% of the initial value, by the three measurement methods used: AOD250 (P 相似文献   

Appositional angle closure in narrow angle eyes

Primary angle closure glaucoma (PACG) is a vision-threatening type of glaucoma. A high prevalence of PACG has been reported in the Asian region. In this review article, we would like to introduce novel findings on appositional angle closure, which plays an important role in the processes of PACG, based upon a new classification. Also, our studies of narrow angle eyes with the use of ultrasound biomicroscopy(UBM) revealed interesting features of appositional angle closure. Our studies showed that appositional angle closure was found frequently in dark conditions, and also that the width and location of the angles examined were significantly related to the presence of appositional angle closure. The use of UBM enabled us to observe physiologic changes in the angle structure in dark conditions, and provided us important information on the pathogenesis of PACG.     

睫状体挫伤的形态学研究

目的探讨严重眼球伤后睫状体各种损伤形态的特点。方法应用超声生物显微镜(ultrasoundbiomicroscopy,UBM)检查眼挫伤连续病例共196例(202)眼。结果109例(121眼,59.90%)有睫状体的损伤,包括:房角后退42例(42眼,20.79%);睫状体分离28例(30眼,14.85%);睫状体脉络膜脱离31例(31眼,15.35%);睫状体脉络膜上腔积血12例(12眼,5.94%);睫状体上皮脱离3例(3眼,1.49%);睫状体破裂3例(3眼,1.49%)。结论眼挫伤后睫状体的损伤多种多样,UBM检查能提供这些损伤的清楚图像,是正确地诊断这些损伤的无创伤性检查方法。     

房角关闭机制指导下可疑原发性房角关闭患者激光干预的疗效评价

目的 根据房角关闭的不同机制,对可疑原发性房角关闭（PACS）患者行激光周边虹膜切除（LPI）术或LPI联合激光周边虹膜成形（LPIP）术,通过超声生物显微镜（UBM）评估PACS患者激光早期干预的疗效。设计 前瞻性病例系列。 研究对象2016年1月-11月在河北省邯郸市眼科医院连续就诊的PACS患者50例（65眼）。方法 根据房角关闭的不同机制,通过UBM评估患眼,对所有入选患眼均首先行LPI治疗,术后第3天复查UBM,检查提示仍存在至少一个象限房角呈接触性关闭的患者再进一步联合LPIP治疗。术后3天复查UBM,根据测量的相关参数的前后变化评价治疗效果。主要指标 UBM图像中的中央前房深度（ACD）,巩膜突前500 μm处的房角开放距离（AOD）、小梁虹膜夹角（TIA）、房角隐窝面积（ARA）、小梁睫状体距离（TCPD）、虹膜厚度（IT）。结果 65眼中,47眼（72.3%）行LPI治疗后3天UBM检查未发现存在至少一个象限的房角接触性关闭,术后AOD、TIA、TCPD、ARA较术前均明显增加（P均<0.01）,IT较术前无明显变化（P=0.465）;18眼（27.7%）行LPI术后3天,UBM提示存在至少一个象限的房角接触性关闭,联合LPIP治疗后AOD、TIA、TCPD、ARA较术前均明显增加（P均<0.01）,IT较LPI术后减少更明显（P<0.01）。结论 LPI后UBM可用于判断房角关闭的机制,并据此考虑是否联合LPIP,可进一步改善非单纯性瞳孔阻滞机制的可疑房角关闭患者的疗效。     

An ultrasound biomicroscopic study of the anterior segment in Indian eyes with primary angle-closure glaucoma

PURPOSE: To evaluate the presence of plateau iris in eyes with primary angle-closure glaucoma (PACG) after laser peripheral iridotomy by gonioscopy and ultrasound biomicroscopy and to evaluate the pathogenesis of this condition by comparing the UBM parameters of these eyes with those in normal subjects. PATIENTS AND METHODS: This prospective study was carried out in the Glaucoma clinic of a tertiary eye care center. A detailed clinical examination including applanation tonometry, indentation gonioscopy with a Sussman four-mirror gonioscope, and ultrasound biomicroscopic examination in one randomly selected eye of 55 patients (55 eyes) with PACG who had undergone laser peripheral iridotomy and 22 normal subjects (22 eyes). RESULTS: Among the PACG eyes, 40% (22/55) had an open angle (angle opening distance > 130 microns) and 60% (33/55) eyes had a narrow angle (angle opening distance 相似文献   

Anterior segment changes during accommodation in eyes with a monofocal intraocular lens: high-frequency ultrasound study

PURPOSE: To analyze anterior segment structure changes during accommodative stimuli after monofocal intraocular lens (IOL) implantation using 2 ultrasound biomicroscopy (UBM) systems. SETTING: Department of Ophthalmology, University of Verona, Verona, Italy. METHODS: Twenty-six eyes (23 patients) with 1 of 4 monofocal IOL types were studied. Five to 9 months postoperatively, the patients were examined by high-frequency UBM using the HiScan system (Optikon 2000 SpA) and UBM 840 system (Carl Zeiss Meditec). Anterior chamber depth (ACD), iris-zonule distance, anterior chamber angle (ACA), scleral-ciliary process angle, and iris-ciliary process angle were measured using both systems. The iris-ciliary process distance and scleral spur perpendicular-sulcus distance were measured with the UBM 840 system and the sulcus-sulcus distance and capsular bag-IOL position with respect to ciliary process apex, with the HiScan system. Two experienced examiners performed all measurements. RESULTS: All parameters except the horizontal iris-ciliary process distance and vertical ACA measured by the UBM 840 system and horizontal ACA by the HiScan system showed significant variation during accommodation. An anterior shift of the IOL-capsular bag ciliary processes--sulcus-zonular iris complex was observed. A simultaneous centripetal shift of ciliary bodies and processes, shown by a reduction in sulcus and capsular bag diameter, was also observed. CONCLUSION: Anterior segment structures demonstrated accommodative movement on UBM after implantation of standard monofocal IOLs.     

青光眼术前睫状体脱离的超声生物显微镜观察

目的：应用超声生物显微镜对急性闭角型青光眼术前睫状体脱离的组织结构进行形态学检查,方法：对青光眼病入术前常规进行超声生物显微镜检查,发现有睫状体脱离。对睫状体脱离者与非睫状体脱离者按年龄、性别、眼压降低幅度,眼前节解剖结构的测量数据进行统计学处理。结果：术前睫状体脱离多出现于眼压50mmHg以上,迅速降至正常或更低,房角大部分关闭但未完全关闭的病人,在272眼急性闭角型青光眼中发现有睫状体脱离者37眼占13．6％,与病人年龄、性别、眼前节解剖参数无显著性的差异,结论：术前睫状体脱离与眼压迅速下降有关。     

人眼睫状体在调节中形态与位置的动态变化

目的了解健康活体人眼在自发视远视近调节中,睫状体形态和位置动态变化的特点。方法利用超声生物显微镜(UBM)的50MHz高频换能器,对68例正常人眼注视远、近不同视标时睫状体形态、位置的变化进行动态观测和统计学分析。结果(1)视近调节时,睫状体前部厚度、睫状突长度、睫状体总面积和环形肌面积增大,睫状突宽度及内尖成角、睫状突与小梁、虹膜、巩膜突的距离,以及其和虹膜、巩膜的夹角减小,前房角开放程度变小。而睫状体后部厚度、纵行肌面积、巩膜虹膜夹角以及小梁虹膜夹角的差异无显著意义。(2)形态各参数间的变化相辅相成、高度一致,位置各参数亦然,但形态与位置之间关系无显著意义。结论人眼视近调节时,睫状体各部肌纤维协调收缩,尤其是环形肌收缩,使睫状突变得尖而细长,睫状体向前向内移动,松弛悬韧带,支持Helmholtz的调节松弛学说。UBM可实时观测人眼调节时睫状体各部分形态和位置等的变化情况。