Efficacy of Combined Phacoemulsification and Goniosynechialysis in the Treatment of Patients with Primary Angle Closure Disease and Concomitant Cataract at Preah Ang Duong Hospital in Cambodia

Background: Goniosynechialysis is a surgical procedure that has been shown to slow the progression of glaucoma in oriental eyes with chronic angle closure glaucoma. This procedure was successful in 80% of cases, and the peripheral anterior syenchiae did not exist until one year later. Nonetheless, there is little evidence of its efficacy in our context. Our study aims to investigate the efficacy of goniosynechialysis during phacoemulsification in patients with primary angle closure disease and concomitant cataract. Methods: This was an observational, prospective study. The intra-ocular pressure, need for anti-glaucoma drugs, visual acuity, the extent of synechiae, anterior chamber depth, surgical success rate, and other indicators were monitored for at least three months following surgery. Results: This study included 114 patients (118 eyes), 61 with chronic angle closure glaucoma (51.69%), 33 with primary angle closure (27.97%), and 24 with acute attack angle closure (20.34%), who were surgically treated with phacoemulsification and goniosynechialysis (Phaco-GSL). The mean intra-ocular pressure had significantly decreased three months after surgery (pre- vs post-op: 22.04 ± 10.86 vs 15.41 ± 6.06 mmHg, p-value p-value p-value p-value p-value Conclusion: Regardless of the type of glaucoma, combined phacoemulsification-goniosynechialysis is effective in lowering pressure, restoring vision, reducing the need for anti-glaucoma drugs, and preventing the synechial recurrence. Success was higher in eyes with less extensive synechiae. Phaco-GSL is safe and effective in the treatment of primary angle closure diseases with co-existing cataract.

Surgical treatment for primary angle closure-glaucoma: a Meta analysis

AIM To evaluate the efficacy and safety of trabeculectomy, phacotrabeculectomy plus intraocular lens implantation (phacotrab+IOL group) and phacoemulsification with IOL (phaco+IOL) in primary angle-closure glaucoma(PACG). METHODS: It was a systematic review and meta-analysis, randomized controlled trials(RCT) and clinical controlled trials (CCT) were collected through electronic searches of the Cochrane Library, PubMed, EMbase, Wanfang Database online, Chinese journal Full-text Database, Chinese Scientific Journals Full-text Database (from the date of building the database to October 2010) We also checked the bibliographies of retrieved articles. M the related data that matched our standards were abstracted. The quality of included trials was evaluated according to the Dutch Cochrane Centre. Rev Man 5.0 software was used for Meta-analysis. RESULTS: A total of 5 RCT and 11 CCT involving 1495 eyes were included. The results of meta-analysis showed that phacotrab+IOL group was superior than trabeculectomy(trab group) (MD -3.93,95% CI [-7.31, -0.54]) which was also superior than phaco+IOL group(MD 0.52,95%CI [0.10, 0.95]) in decreasing Intraocular Pressure(IOP). Phacotrab group(MD -1.45,95%CI [-1.68, -1.22])and phaco group (MD-1.12,95% CI [-1.87, -0.37])are both deeper than trab group in the anterior chamber depth. In increasing the coefficient of outflow facility of aqueous humor (C values) there was no statistical difference in the three groups. And there was no statistical difference between phacotrab groups and phaco groups in visual acuity but phacotrab group was superior than phaco group (MD 1.07, 95% CI [0.73, 1.40])in the use of IOP-lowering drugs. There was no statistical difference among three groups. CONCLUSION: Current evidence suggests that phacotrab+IOL group was superior than tab group which was also superior than phaco+IOL group in decreasing IOP. Phacotrab group and phaco group are both deeper than trab group in the anterior chamber depth. Phacotrab group was superior than phaco group in the use of IOP-lowering drugs.

Diffusion tensor imaging of optic nerve and optic radiation in primary chronic angle-closure glaucoma using 3T magnetic resonance imaging

AIM: To evaluate the value of quantitative diffusion tensor imaging (DTI) in assessing the axonal and myelin damage of the optic nerves and optic radiations in patients with chronic primary angle -closure glaucoma (PACG) by using high -field magnetic resonance (MR) imaging (3T). METHODS: Twenty patients with bilateral chronic PACG and twenty age - and sex matched disease -free control subjects were enrolled. Conventional MRI and DTI were performed on all subjects using 3T MR scanner. Mean diffusivity (MD), fractional anisotropy (FA), axial diffusivities (AD) and radial diffusivities (RD) of each optic nerve and each optic radiation were measured by using post -processing software of DTI studio 2.3, and then compared between left eyes and right eyes and between patients group and control group. The pairedsample t- test were used. RESULTS: There was no abnormality in the shape and signal intensity of the optic nerves and optic radiations in patients group and control group on the conventional MRI. No significant differences were observed in the FA, MD, AD and RD between the right and left optic nerves and optic radiations within patients group and control group (P>0.05). The optic nerves and optic radiations of patients with chronic PACG, as compared with control subjects, had significantly higher MD, AD, RD and significantly lower FA (P<0.05). CONCLUSION: The diffusivity of optic nerves and optic radiations in chronic PACG group showed abnormal and diffusivity parameters could be used markers of axonal and myelin injury in glaucoma.

Mechanism and Etiology of Primary Chronic Angle Closure Glaucoma

The ocular anatomic features, pupil-blocking force, status of angle synechiae closure and positivity of provocative tests were compared between the primary chronic angle closure glaucoma (PCACG) and primary a-cute angle closure glaucoma (PAACG) by using ultrasonic biometry, computerized anterior ocular segment image processing technique, gonioscopy and provocative tests. The studies showed that the anterior chamber depth of PAACG was shallower than that of PCACG; the pupil-blocking force of PAACG was st...

The association between matrix metalloprotease-9 gene polymorphisms and primary angle-closure glaucoma in a Chinese Han population

AIM:To examine the association between the single nucleotide polymorphisms (SNPs)of matrix metalloprotease-9 (MMP-9) gene and primary angleclosure glaucoma(PACG)in a Chinese Han population.METHODS:DNA samples were extracted from peripheral-blood mononuclear cells of 214 PACG patients and 224 healthy controls.Genotyping of rs3918249,rs3918254,rs17577 and rs3787268 in MMP-9was performed using polymerase chain reaction restriction fragment length polymorphism(PCR-RFLP)analysis and the direct sequencing technique.The association between these genetic polymorphisms and risk of PACG was estimated by χ2 test.RESULTS:The distributions of rs3918249,rs3918254,rs17577 and rs3787268 genotypes among cases and healthy controls were compatible with that from HardyWeinberg equilibrium(HWE,P】0.05).The increased frequency of CC and CT genotypes of rs3918254 were observed in PACG patients compared to healthy controls[P=0.006,P corrected(Pcorr)=0.048].The haplotype analysis showed that the CCGG haplotype was nominal associated with PACG(P=0.015),however,the significant was lost when the Bonferroni correction was used(Pcorr=0.105).CONCLUSION:Our results revealed that rs3918254 in MMP-9 may be a susceptible locus to PACG in China,people with the CC and CT genotypes of rs3918254 are more susceptible to PACG.The susceptibility to PACG inChinese Han patients may be not influenced by SNPs rs3918249,rs3787268 and rs17577 in MMP-9.

Phacoemulsification versus combined phacotrabeculectomy in the treatment of primary angle-closure glaucoma with cataract: a Meta-analysis

AIM： To compare the efficacy and safety of phacoemulsification（Phaco） against combined phacotrabeculectomy（Phacotrabe） in primary angle-closure glaucoma（PACG） with coexisting cataract.·METHODS： By searching electronically the Pub Med,EMBASE, Scientific Citation Index and Cochrane Library published up from inception to January 2014, all randomized controlled trials that matched the predefined criteria were included. The quality of included trials was evaluated according to the guidelines developed by the cochrane collaboration. And the outcomes estimating efficacy and safety of two different surgical treatments were measured and synthesised by Rev Man 5.0.· RESULTS： Five randomized controlled trials were selected and included in Meta-analysis with a total of468 patients（468 eyes） with both PACG and cataract. We found that Phacotrabe had a greater intraocular pressure（IOP） lowing effect [preoperative IOP： weighted mean difference（WMD）=0.58, 95% confidence intervals（95% CI,-0.53 to 1.69）, P =0.31; postoperative IOP： WMD =1.37,95% CI（0.45 to 2.28）, P =0.003], a lower number of antiglaucoma medications [risk ratio（RR）=0.05, 95% CI（0.02 to 0.18）, P 〈0.00001] needed postoperatively and less serious damage of optic nerve [RR =0.48, 95% CI（0.21 to 1.07）, P =0.07], but a higher risk of complications[odds ratio（OR）=0.04, 95% CI（0.01 to 0.16）, P 〈0.00001]compared with Phaco. The rest studies indicated that there had no significantly difference between the two surgical methods for postoperative best-corrected visual acuity（BCVA） [WMD =-0.05, 95% CI（-0.14 to 0.05）, P =0.32] and loss of visual field [RR=1.06, 95% CI（0.61 to1.83）, P =0.83].·CONCLUSION： Phaco alone compared with Phacotrabe had a better effect in IOP reduction, whereas the securitydecline. Considering the number of sample size, our results remains to be further studied.

The safety and efficacy of modified minimally invasive trabeculectomy for the treatment of primary chronic angle-closure glaucoma

Background: Primary chronic angle-closure glaucoma(PCACG) is one of the main types of glaucoma in China. Trabeculectomy is the most commonly used glaucoma filtration surgery for glaucoma in the world. Conventional trabeculectomy is prone to anesthesia-related complications intraoperative and operationrelated complications postoperative in PCACG treatment. Modified minimally invasive trabeculectomy maybe can reduce the incidence of complications.Methods: We conducted a prospective case series study and performed modified fornix-based trabeculectomy in 27 patients(30 eyes) under topical anesthesia; we then observed intraoperative anesthesia and cooperation ef ect, intraoperative and postoperative complications, preoperative and postoperative visual acuity, intraocular pressure(IOP), visual field, and the use of ocular hypotensive drugs. The patients were followed up for at least 12 months.Results: All operations were completed successfully with no intraoperative complications. All 27 patients(30 eyes) were followed up for at least 12 months. No significant decrease in visual acuity was observed at days 1 or 7 and at months 1, 3, 6, and 12 after operation; however, a signii cant decrease in IOP was observed at days 1 and 7 and at months 1, 3, 6, and 12 after operation. Moreover, no significant progression in visual field mean defect was observed at month 12 after operation, and the number of ocular hypotensive drugs required was significantly reduced at months 6 and 12 after operation. By month 12 after operation, the overall success rate was 93.33%(28/30).Conclusions: Modii ed minimally invasive trabeculectomy is safe and ef ective for the treatment of PCACG.

Primary Chronic Angle-closure Glaucoma in Chinese——A Clinical Exploration of Its Pathogenesis And Natural Course

Fourty-three cases (86 eyes) of primary chronic angle-closure glaucoma were randomly selected. An additional 44 cases (77 eyes) of primary acute angle-closure glaucoma and 30 normal subjects (34 eyes) were also randomly enrolled as control groups for comparison in the clinical study. Ultrasonic biometric measurements of the anterior chamber depth, lens thickness and axial length of the eyeball were performed. Using an potic microgauge attached to the slit-lamp, the entrance of anterior chamber angle was...

Increased aquaporin-1 levels in lens epithelial cells with primary angle-closure glaucoma

AIM： To determine the levels of aquaporin-1（AQP-1） in the lens epithelial cells（LECs） of primary glaucoma and to clarify its correlation with lens thickness.METHODS： This study comprised 64 eyes of 64 patients with primary glaucoma, who were divided into 3 groups： 25 eyes of 25 patients with acute primary angle-closure glaucoma（APACG）, 19 eyes of 19 patients with chronic primary angle-closure glaucoma（CPACG） and 20 eyes of 20 patients with primary open angle glaucoma（POAG）. This study also included 12 eyes of 12 patients with senile cataract as controls. The levels of AQP-1 in LECs were examined by real-time quantitative polymerase chain reaction（RT-q PCR） and immunohistochemistry. The lens thickness was measured by A-scan ultrasonography. RESULTS： The AQP-1 m RNA levels of LECs were 0.84±0.27, 0.69±0.34, 0.44±0.19 and 0.51±0.21 in APACG, CPACG, POAG and senile cataract group, respectively. The levels of AQP-1m RNA were significantly higher in PACG groups compared with those in senile cataract and POAG group（all P〈0.05）. The immunohistochemistry showed the AQP-1 expression were strong-positive in PACG groups, but weak-positive in senile cataract and POAG group. A positive correlation was found between AQP-1 m RNA levels and the lens thickness（r=0.645, P〈0.001）. CONCLUSION： These findings show that the higher expression of AQP-1 in LECs may contribute to increased lens thickness, which might be associated with the occurrence and development of PACG.

Evaluating correlation between the ocular biometry and genetic variants of MYOC and ABCA1 with primary angleclosure glaucoma in a cohort from northern China

AIM: To investigate whether the gene variants in MYOC and ABCA1 are associated with primary angle-closure glaucoma(PACG) and anterior chamber depth(ACD) and axial length(AL) in samples from northern China. METHODS: The present case-control association study consisted of 500 PACG patients and 720 unrelated controls. Each participant was genotyped for eleven single nucleotide polymorphisms(SNPs) in MYOC and ABCA1 genes(rs12076134, rs183532, rs235875 and rs235913 in MYOC, rs2422493, rs2487042, rs2472496, rs2472493, rs2487032, rs2472459 and rs2472519 near ABCA1) using an improved multiplex ligation detection reaction(iMLDR) technique. The genetic association analyses were performed by PLINK using a logistic regression model. The association between genotypes and ocular biometric parameters was performed by SPSS using generalized estimation equation. Bonferroni corrections wereimplemented and the statistical power was calculated by the Power and Sample Size Calculation. RESULTS: Two SNPs rs183532 and rs235875 as well as a haplotype TTC in MYOC were nominally associated with PACG despite the significance was lost after Bonferroni correction. No association was observed between ABCA1 and PACG, neither did the association between these variants and ACD as well as AL. CONCLUSION: The present study suggests MYOC and ABCA1 do not play a part in the pathogenesis of PACG as well as the regulation of ocular biometric parameters in a northern Chinese population. Further investigations with large sample size are needed to verify this consequence.

The effect of lens parameters on the development of the primary angle-closure glaucoma

Objective ：To investigate the role the lens dimensions played on the pathogenesis of primary angle-closure glaucoma. Methods：38 eyes of 20 patients with primary angle-closure glaucoma （PACG） and 35 eyes of 22 normal individuals without ocular abnormalities were examined. The anatomical parameters of the lens and other structures of the anterior segment were calculated using B ultrasound, computer image processing and ultrasound biomicroscopy （UBM）. The parameters were compared between the patients and normal subjects. Correlation analysis was used to determine the relationship between the radii of curvature of the anterior lens surface （RCALS） and the other parameters of the anterior segment. Results：Compared with the normal eyes, the eyes of PACG had thicker lens, steeper curvature of anterior lens surface, decreased depth of the anterior chamber, narrower chamber angle, and more anterior position of the ciliary bodies and lens. All these differences were significant（P 〈 0.05 or P 〈 0.01）. In the PACG group, the RCALS had significantly negative correlation with the central and peripheral lens thickness （P 〈 0.01 and P 〈 0.05 respectively）, and had positive correlation with relative lens position, anterior chamber depth（ACD）, angle-open distance at 500 um（AOD500）, trabecular iris angle （TIA） and trabecular ciliary processes distance（TCPD, P 〈 0.05 or P 〈 0.01 ）. Conclusion：The occurrence of PACG is relevant to the abnormal anatomical structures of the anterior segment. Among all factors, the lens parameters play an important role in the pathogenesis. Increased lens thickness, relative more anterior position of lens, especially steepened curvature of anterior lens surface are predisposing factors of the pathologic phenomenon in PACG including pupillary blockage, shallow anterior chamber, secondary closure of chamber angle and elevation of intraocular pressure.

超声乳化吸除术联合房角分离术治疗PACG滤过术后眼压失控的临床疗效观察

目的探讨超声乳化吸除术(Phaco)+人工晶状体(IOL)植入联合房角分离术治疗原发性闭角型青光眼(PACG)滤过术后眼压失控的临床疗效。方法回顾性病例研究。对2020年8月至2022年5月收治的24例(25只眼)PACG滤过术后眼压失控患者,采用Phaco+IOL植入联合房角分离术治疗,比较术前、术后1 d、1周、1个月、3个月、6个月的眼压情况,术前及6个月最佳矫正视力(BCVA)、房角粘连性关闭(PAS)范围变化情况。记录术中、术后并发症情况。结果术后1 d、1周、1个月、3个月、6个月眼压、PAS范围均显著低于术前,差异具有统计学意义(均P<0.05);术后6个月视力较术前21例(22只眼)BCVA提高,3例(3只眼)BCVA无变化;术中10只眼发生前房出血,术后6只眼发生短暂性前房出血,15只眼发生前房渗出,8只眼发生角膜水肿。结论Phaco+IOL植入联合房角分离术治疗PACG滤过术后眼压失控能够有效降低眼压,提高患者视力,是安全有效的治疗方法。

PEI联合术中房角镜下房角分离及房角切开术治疗中晚期PACG合并白内障

目的:评价超声乳化白内障吸除人工晶状体植入术(PEI)联合术中房角镜直视下房角分离术(GSL)及房角切开术(GT)治疗中晚期原发性闭角型青光眼(PACG)合并白内障的效果。方法:回顾性病例系列研究方法。收集2021-12-01/2023-03-31在安徽医科大学第二附属医院手术的中晚期PACG合并白内障患者62例65眼,根据手术方式不同分为两组:观察组30例32眼行PEI+GSL+GT,对照组32例33眼行PEI+GSL。评估两组患者术前,术后1 d, 1 wk, 1、3、6 mo眼压、最佳矫正视力(BCVA)和抗青光眼药物使用数量。术前和术后6 mo时分别评估视野、杯盘比、前房角开放范围、前房深度、RNFL平均厚度。结果:PEI+GSL+GT组术后6 mo眼压和平均眼压降幅(16.68±2.65、11.12±8.53 mmHg)与PEI+GSL组(18.71±2.51、8.32±4.17 mmHg)有显著差异(P<0.05),眼压降幅率无差异(44.57%±21.79%和35.20%±17.94%,P>0.05)。术后6 mo两组抗青光眼药物使用数量、BCVA、前房深度、房角关闭范围均较术前改善(均P<0.01),PEI+GSL+GT组术后6 mo的药物减少数量和房角开放范围均大于PEI+GSL组(P<0.05),其余指标两组间比较均无差异(均P>0.05)。两组术后6 mo的视野平均偏差、杯盘比及RNFL平均厚度较术前均无差异(均P>0.05)。PEI+GSL+GT组手术完全成功率为81%(26/32),手术条件成功率为94%(30/32);PEI+GSL组手术完全成功率为58%(19/33),手术条件成功率为76%(25/33)。两组间手术成功率均有差异(完全成功率χ^(2)=4.275,P=0.039;条件成功率χ^(2)=4.040,P=0.044)。两组患者均未见危及视力的并发症及再次手术。结论:对于中晚期原发性闭角型青光眼合并白内障患者,采用PEI+GSL+GT治疗比PEI+GSL治疗更有效。

基于数据挖掘探析国家专利中药复方治疗PACG的用药规律

目的基于数据挖掘探析国家专利中药复方治疗原发性闭角型青光眼(PACG)的用药规律。方法纳入建库至2022年12月31日中国专利公布公告网站中治疗PACG的中药复方专利。采用Excel软件对中药复方建立数据库并进行数据处理,运用R语言进行频数统计、功效归类、性味归经、关联规则及聚类分析。结果(1)一般情况:共纳入专利160项,共涉及药物510味,药物累计频次2,055次。(2)性味归经:四气为寒性药最多,共27味(49.09%);五味以甘味药最多,共71味(47.97%);归经以肝经最多,共38味(25.00%)。(3)高频中药使用频次:使用频次>10次的中药(高频中药)有55味,使用频次最高为枸杞子(46次,28.75%),其次为熟地黄(42次,26.25%)、菊花(41次,25.63%)、甘草(39次,24.38%)、决明子(38次,23.75%)。(4)高频中药功效归类分析:排名前5位为清热药(14味,25.45%)、补虚药(12味,21.82%)、解表药(8味,14.55%)、平肝息风药(5味,9.09%)、利水渗湿药(4味,7.27%)。(5)关联规则分析:高频药对排名前5位分别为:菊花-枸杞子(21次,9.21%)、茯苓-枸杞子(20次,8.77%)、决明子-菊花(20次,8.77%)、泽泻-菊花(18次,7.89%)、熟地黄-菊花(18次,7.89%)。(6)聚类分析:共得到6类有效组合。第Ⅰ类功效为清热泻火,疏肝解郁;第Ⅱ类功效为祛风解表,凉血解毒;第Ⅲ类功效为活血祛瘀,通经止痛;第Ⅳ类功效为滋肾养阴,平肝潜阳;第Ⅴ类功效为滋补肝肾,化痰泻火;第Ⅵ类功效为滋补肝肾,祛风化火。结论国家专利中药复方治疗PACG有规律可循,多从肝、肾、脾入手,组方寒温并用,虚实兼顾,标本兼治,主要针对风、火、痰、虚、郁、瘀六类致病因素。

COVID-19疫情暴发后急性PACG发作影响因素分析

目的分析新型冠状病毒感染(COVID-19)疫情暴发后急性原发性闭角型青光眼(PACG)患者在拟行青光眼手术患者中的构成比及发病的影响因素。方法采用横断面研究,以整群抽样法,通过医院信息化系统收集COVID-19疫情暴发后徐州市第一人民医院2022年12月16日至2023年1月16日住院拟行青光眼手术的患者141例及2021—2022、2020—2021、2019—2020年同期(12月16日至次年1月16日)住院拟行青光眼手术的患者231例。选取其中疫情暴发后急性PACG患者92例92眼为研究组,2021—2022年同期住院的急性PACG患者21例21眼为对照组。分析观察期内拟行手术的各类型青光眼患者构成比和急性PACG患者在拟行青光眼手术患者中的构成比及其临床特征,包括年龄、性别、视力、眼压、房角关闭程度。通过电话回访形式获得患者COVID-19后抗感冒药物服用情况、生活习惯和心理情绪变化(包括日饮水量和焦虑)等流行病学资料,采用医院抑郁和焦虑量表(HADS)评估研究组患者焦虑程度,分析疫情暴发后急性PACG患者发作的诱发因素。结果疫情暴发后1个月内徐州市第一人民医院急性PACG患者占比较2021—2022、2020—2021及2019—2020年同期显著增加,差异均有统计学意义(χ2=31.066、33.331、20.804,均P<0.001)。研究组与对照组不同等级视力眼数分布情况、眼压、眼压≥30 mmHg(1 mmHg=0.133 kPa)者及不同房角状态眼数分布情况比较,差异均无统计学意义(均P>0.05)。对照组发病期间患者无COVID-19及服用抗感冒药物等病史。研究组发病期间92例(占100%)患者新型冠状病毒核酸检测结果均为阳性,其中57例(占61.96%)有口服抗感冒药物史;同期住院其他类型青光眼患者49例,新型冠状病毒核酸检测结果均为阳性(占100%),20例(占40.82%)有口服抗感冒药物史。研究组急性PACG患者和同期其他类型青光眼患者口服抗感冒药物人数占比比较,差异有统计学意义(χ2=5.764,P=0.016)。研究组在COVID-19疫情暴发期间,诉日饮水量较之前有不同程度增加;研究组焦虑患者76例,占82.6%。多重线性回归分析显示:眼压=19.052+0.009×日饮水量+0.858×HADS评分(R 2=0.780),日饮水量和HADS评分的标准化回归系数分别为0.542和0.452,日饮水量较HADS评分对眼压影响更大。结论COVID-19疫情暴发后急性PACG患者在拟行青光眼手术患者中所占比率显著升高,可能与口服含血管收缩剂或抗组胺成分的抗感冒药物、日饮水量增加、焦虑等生活习惯和心理情绪变化等诱发因素有关。

Refractive errors and biometry of primary angle-closure disease in a mixed Malaysian population

AIM： To assess the refractive status, anterior chamber depth （ACD） and axial length （AL） of patients with primary angle-closure disease （PACD）. METHODS： Retrospective cohort. Data was collected from charts of all PACD patients treated from April 2013 to December 2015. Analysis was done on 137 patient charts with complete biometric data. Patient demographics, PACD type, refractive status （spherical equivalent）, ACD and AL were studied. RESULTS： The median age of 137 subjects [53 with primary angle-closure suspects （PACS）, 27 with primary angle- closure （PAC） and 57 with primary angle-closure glaucoma （PACG）] was 68y （range 21-88y）. The majority was Chinese （n=68; 49.6%） and most of them were women （n=75; 54.7%）. The distribution of myopia （n=51; 37.2%） and hyperopia （n=49; 35.8%） was similar. The ACD was shallower in myopes compared to hyperopes （P=-0.02） and emmetropia （P=-0.049） but the AL was not significantly different between groups. There were no patients blind from PACG. CONCLUSION： Both myopia and hyperopia can occur in PACD. Despite a shallower ACD in angle closure myopes, the AL was not different between groups.

Studies of Primary Angle Qosure Glaucoma in China

The resent researches on primary angle closure glaucoma (PACG) in China were reviewed. The prevalence of PACG (0.41%) in chinese is between the Caucasian and Eskimos, and chronic type is the dominant type in PACG. However, with the economic development and medical care improvements, the prevalence condition of PACG may change; several researches discovered that the mechanism of PACG, especially the chronic type, is not only because of pupil-blocking but also closely related to the mechanism of crowding of peripheral iris and the anterior location of the ciliary body. We supposed that PACG can be divided into several subtypes based on this machnism. Also, we believe that the use of ultrasound biomicroscopy (UBM) and ophthalmic laser in China has promoted the research of PACG and improved the level of prevention and treatment of PACG. Eye Science 1997; 13 : 120- 124.

房角镜下房角分离术治疗PACG操作规范专家推荐意见

近年来的临床研究和临床实践表明微创青光眼手术(MIGS)在治疗原发性闭角型青光眼(PACG)中具有较好的疗效和安全性,已在临床上得到广泛关注和应用。房角分离术(GSL)可通过分离粘连在房角上的虹膜组织而使关闭的房角结构重新开放,是MIGS治疗PACG的重要步骤。然而,目前我国GSL操作仍缺乏统一的规范,影响了治疗效果的有效评价,也增加了手术并发症的风险。制定详细、完整的GSL操作规范专家推荐意见对于提高手术成功率、改善患者的视觉质量和生活质量是非常必要的。本专家组就GSL的适应证、手术麻醉方式、手术部位、手术步骤、房角分离范围、联合术式、围手术期用药等问题进行讨论,基于国内外重要文献并结合临床实践以及相关领域的最新进展对GSL技术提出专家建议。

小梁切除术后眼压失控的PACG行超声乳化联合房角分离治疗的有效性和安全性

目的:研究小梁切除术后眼压失控的原发性闭角型青光眼(PACG)行白内障超声乳化联合房角分离术治疗的安全性和有效性。方法:纳入2015年5月-2020年10月收治的小梁切除术后眼压失控的PACG患者41例(43眼)作为研究对象,对所有病例采取白内障超声乳化联合房角分离术,术后随访6月,观察术前及术后1周,1、3、6月眼压、最佳矫正视力(BCVA)、中央前房深度、房角粘连性关闭(PAS)范围变化,术前和术后6月角膜内皮细胞计数,记录术中、术后并发症情况。结果:(1)眼压变化:术前眼压(29.83±5.98)mmHg,术后1天,1周,1、3、6月眼压分别为(12.18±3.86)mmHg、(13.02±4.29)mmHg、(15.18±6.87)mmHg、(15.03±5.98)mmHg、(15.37±4.79)mmHg,术后眼压下降明显,差异有统计学意义(F=31.412,P<0.01);(2)BCVA变化:术前与术后BCVA总体分布,差异有统计学意义(F=62.014,P<0.001);(3)PAS范围变化:术后各时间点PAS范围均明显小于术前(t=60.402,P<0.001);(4)角膜内皮细胞计数变化:术后6月角膜内皮细胞计数与术前比较无明显变化,差异无统计学意义(t=1.321,P=0.113);(5)前房深度变化:术后1、6月中央前房深度分别为(4.03±0.33)mm、(4.01±0.36)mm,较术前(1.82±0.29)mm均有明显增加,差异有统计学意义(F=1068.542,P<0.01)。(6)并发症:术后角膜水肿5眼,前房炎症反应伴纤维性渗出2眼,前房出血1眼,经治疗均在1周内消退。无后囊破裂、无虹膜损伤及恶性青光眼等并发症发生。结论:对小梁切除术后眼压失控合并白内障的PACG,采取白内障超声乳化联合房角分离手术治疗是一种安全、有效的方法,值得临床推广。

激光周边虹膜切除术在原发性急性闭角型青光眼患者中的应用效果及对眼压和视力的影响

目的探讨激光周边虹膜切除术在原发性急性闭角型青光眼患者中的应用效果及对眼压和视力的影响。方法以随机法选取2020年10月至2022年10月的80例(86眼)原发性急性闭角型青光眼患者作为研究对象,所有患者给予激光周边虹膜切除术治疗。观察患者术前、术后的眼压、视力水平、房角关闭情况及角膜内皮细胞指标。结果术后,患者的眼压低于术前,视力水平高于术前(P<0.05)。术后,患者的前房角角度(ACA)、前房容积(ACV)和周边前房深度(PACD)均显著大于术前(P<0.05);术后,患者的中央前房深度(CACD)与术前比较,差异无统计学意义(P>0.05)。术后,患者的平均内皮细胞面积(AVE)、最大细胞面积(MAX)、最小细胞面积(MIN)、细胞密度(CD)、变异系数(CV)及细胞面积标准差(SD)与术前比较,差异无统计学意义(P>0.05)。结论原发性急性闭角型青光眼患者早期给予激光周边虹膜切除术治疗对降低眼压有明显效果,且还能提升视力水平,改善房角关闭情况,对患者角膜内皮细胞的损伤较小,安全性较高。