Axial length,vitreoretinal pathology,and anterior chamber depth can predict postoperative refractive outcomes in phacovitrectomy/silicone oil removal

AIM:To evaluate the postoperative refractive prediction error(PE)and determine the factors that af fect the refractive outcomes of combined pars plana vitrectomy(PPV)or silicone oil removal(SOR)with cataract surgery.METHODS:The study is a retrospective,case-series study.Totally 301 eyes of 301 patients undergoing combined PPV/SOR with cataract surgery were enrolled.Eligible individuals were separated into four groups according to their preoperative diagnoses:silicone oil-filled eyes after PPV(group 1),epiretinal membrane(group 2),macular hole(group 3),and primary retinal detachment(RD;group 4).The variables af fecting postoperative refractive outcomes were analyzed,including age,gender,preoperative best-corrected visual acuity(BCVA),axial length(AL),keratometry average,anterior chamber depth(ACD),intraocular tamponade,and vitreoretinal pathology.The outcome measurements include the mean refractive PE and the proportions of eyes with a PE within±0.50 diopter(D)and±1.00 D.RESULTS:For all patients,the mean PE was-0.04±1.17 D,and 50.17%of patients(eyes)had a PE within±0.50 D.There was a significant difference in refractive outcomes among the four groups(P=0.028),with RD(group 4)showing the least favorable refractive outcome.In multivariate regression analysis,only AL,vitreoretinal pathology,and ACD were strongly associated with PE(all P<0.01).Univariate analysis revealed that longer eyes(AL>26 mm)and a deeper ACD were correlated with hyperopic PE,and shorter eyes(AL<26 mm)and a shallower ACD were correlated with myopic PE.CONCLUSION:RD patients have the least favorable refractive outcome.AL,vitreoretinal pathology,and ACD are strongly associated with PE in the combined surgery.These three factors affect refractive outcomes and thus can be used to predict a better postoperative refractive outcome in clinical practice.

Anterior Chamber Depth Changes in Narrow Iridocorneal Angles after Phacoemulsification

Background: The burden of cataract and glaucoma has been increasing. Primary angle closure occurs as a result of crowded anterior segment anatomy causing appositional contact between peripheral iris and trabecular meshwork. Lens extraction has been proposed as a method of deepening anterior chamber and managing intraocular pressure. Purpose: To assess changes in anterior chamber depth after phacoemulsification with intraocular lens implantation in narrow angle eyes. Design: Prospective controlled trial (before-after) study. Method: The study was conducted from March 2015 to August 2017 among the patients of department of Ophthalmology of BSMMU who were diagnosed as cataract with narrow angles. Anterior chamber angle grading of 2 or less (Shaffer grading) in 3 or more quadrants was considered narrow angle (NA). The purposive type sampling technique was applied to collect sample from the study population, as per inclusion and exclusion criteria. Complete clinical evaluation including history, physical examination, relevant ocular examinations and systemic examinations were performed. In this prospective study, subjects underwent phacoemulsification with foldable lens implantation. A scan ultrasonography was performed preoperatively and 10th and 30th postoperative days of surgery. Results: Thirty eyes of 29 patients included in the study, male: female ratio was 1:1, with an overall mean age of 62.03 ± 8.95 years. The mean preoperative central ACD was 2.95 ± 0.35 mm. At 10th and 30th POD mean central ACD were 3.94 ± 0.32, and 3.92 ± 0.28 mm respectively. Mean of increase in central ACD at final follow-up was 0.96 mm (p Conclusion: Phacoemulsification with posterior chamber in bag lens implantation can deepen the anterior chamber depth in patients with narrow angles. Based on these findings, it is concluded that phacoemulsification with foldable intraocular lens implantation is an effective tool in deepening the anterior chamber.

Device interchangeability on anterior chamber depth and white-to-white measurements: a thorough literature review

We have reviewed a set of recently published studies that compared the anterior chamber depth（ACD） and/or white-to-white（WTW） distance obtained by means of different measuring devices.Since some of those studies reached contradictory conclusions regarding device interchangeability,this review was carried out in attempting to clarify which clinical devices can or cannot be considered as interchangeable in clinical practice to measure ACD and/or WTW distance,among these devices：A-scan,ultrasound biomicroscopy,Orbscan and Orbscan Ⅱ（Bausch＆Lomb Surgical Inc.,San Dimas,California,USA）,Pentacam and Pentacam HR（Oculus,Wetzlar,Germany）,Galilei（Ziemer,Switzerland）,Visante optical coherence tomography（Visante OCT,Carl Zeiss Meditec Inc.,Dublin,California,USA）,lOLMaster（Carl Zeiss Meditec,Jena,Germany）,and Lenstar LS 900/Biograph（Haag-Streit AG,Koeniz,Switzerland/Alcon Laboratories Inc.,Ft Worth,Texas,USA）.

Measurement of the depths at different regions of the anterior chamber in healthy Chinese adults

AIM: To measure the depths of different regions of the anterior chamber(AC) in healthy Chinese adults, and to explore possible correlations with age or gender.METHODS: The AC was imaged by swept-source optical coherence tomography in healthy Chinese adults. The horizontal scan of the right eye was used to measure the anterior chamber depth(ACD) at 199 points.RESULTS: A total of 309 images from 309 subjects were analyzed. The ACD values at nearly all locations were negatively correlated with age(all P<0.05), except for ACD1, 2, 198, and 199(correspond to the iris roots). The mean annual decrease 0.013±0.005 mm/y for all ACDs combined, 0.008±0.004 mm/y for the peripheral region, 0.017±0.003 mm/y for the middle peripheral region, and 0.014±0.001 mm/y for the central region. The mean annual decrease was significantly different among these three regions(P<0.001). The ACD was greater in males than in females(P<0.05). The mean difference in ACD between males and females was 0.081±0.025 mm.CONCLUSION: This study showed that optical coherence tomography can be used to measure the ACD of different regions of the AC. We found reductions in ACD with age, although the reduction varied among different points, in healthy Chinese adults.

Effect of axial length and anterior chamber depth on the peripheral refraction profile

AIM:To evaluate the effect of axial length(AL)and anterior chamber depth(ACD)on peripheral refractive profile in myopic patients compared to emmetropic participants.METHODS:This cross-sectional study was conducted in right eyes of 58 participants of whom 38 were emmetropic and 20 were myopic.Central and peripheral refraction were measured at 10°,20°,and 30°eccentricities in nasal and temporal fields using an open-field autorefractor.The Lenstar LS900 was used to measure ACD and AL.The participants were divided into three groups of short(<22.5 mm),normal(22.5-24.5 mm),and long eye(>24.5 mm)according to AL and three groups of low ACD(<3.00 mm),normal ACD(3.00-3.60 mm),and high ACD(>3.60 mm)according to ACD.RESULTS:The mean age of the participants was 22.26±3.09 y(range 18-30 y).The peripheral mean spherical refractive error showed a hypermetropic shift in myopic and emmetropic groups although this shift was more pronounced in the myopic group.The results showed significant changes in the spherical equivalent,J0,and J45 astigmatism in all gazes with an increase in eccentricity(P<0.001).The pattern of refractive error changes was more noticeable in long and short eyes versus normal AL eyes.Moreover,the pattern of peripheral refractive changes was much more prominent in the high ACD group versus the normal ACD group and in the normal ACD group versus the low ACD group.CONCLUSION:Peripheral refraction changes are greater in participants with AL values outside the normal range and deeper ACD values compared to participants with normal AL and ACD.

Distribution of Axial Length, Anterior Chamber Depth and Lens Thickness of Pre-Operative Cataract Patients in Indonesian Population

Purpose: Biometry measurement of pre-operative cataract patients plays a major role in calculating intraocular lens power. This study aimed to review and determine the distribution of biometry components, such as axial length (AL), anterior chamber depth (ACD), and lens thickness (LT) of pre-operative cataract patient in Indonesian population. Methods: A cross-sectional study data were obtained from 2015-2018 cataract surgery at Prima Husada Citra Hospital, Surabaya, East Java, Indonesia. A total of 1295 eyes with cataract was included in the study based on their medical record. We analyzed the data using descriptive analysis and correlated each variable using the Spearman’s Rho analysis. Results: Mean AL, LT and ACD was 23.81 ± 1.46 mm, 4.49 ± 0.55 mm, 3.25 ± 0.70 mm respectively. Male has longer AL and deeper ACD with (p < 0.001), while LT was found thicker in female (p = 0.005). The increase of AL was accompanied by ACD (r = 0.457;p < 0.001) and a thinner LT (r = -0.101;p < 0.001). Conclusions: LT is increased with age while AL and ACD are shortened with age. There was a positive correlation between AL and ACD, but an inverse correlation between AL and LT.

Effect of low dose laser cycloplasty on deepening anterior chamber in chronic angle-closure glaucoma

AIM:To describe the outcome of using low-dose laser cycloplasty(LCP)in chronic angle-closure glaucoma(CACG).METHODS:A retrospective case series.Medical charts of CACG patients who underwent LCP in the Eye Hospital of Wenzhou Medical University were reviewed.The main outcomes included intraocular pressure(IOP),the number of glaucoma medication,anterior segment parameters and surgery-related complications.RESULTS:A total of 7 eyes of 7 CACG patients(age 38.9±11.0y)underwent LCP with a mean follow-up of 27.1±13.7mo(range 16-48mo).Following LCP,mean IOP and glaucoma medications decreased from 26.1±6.1 mm Hg with 3.1±1.1 glaucoma medications pre-treatment to 14.9±3.1 mm Hg(P=0.027)with 0.4±1.1 glaucoma medications(P=0.001)at final follow-up.The anterior chamber depth(ACD),angle opening distance500 and trabecular-iris angle increased from 1.65±0.33 mm,0.05 mm(range 0-0.30 mm)and 5.1°(range,0-31.97°)at baseline to 1.98±0.43 mm(P=0.073),0.53 mm(range 0.42-0.91 mm,P=0.015),45.9°(range,40.2°-59.4°),(P=0.015)in the long-term follow-up,respectively.The deepening of ACD and reopening of anterior chamber angle(ACA)was observed in 6 eyes(85.7%).CONCLUSION:LCP is a promising treatment option for patients with CACG via reducing IOP and glaucoma medication without serious complications.In addition,LCP can bring a significant deepening in ACD and reopening of ACA.

Axial length and anterior chamber indices in elderly population: Tehran Geriatric Eye Study

AIM:To determine the normative distribution of axial length(AL),anterior chamber depth(ACD),anterior chamber volume(ACV),anterior chamber angle(ACA),and some of their associated factors in subjects aged 60 and over.METHODS:In this cross-sectional study,160 clusters were sampled using multi-stage cluster sampling in Tehran,Iran.After a preliminary interview,the participants underwent optometric examinations including visual acuity and refraction measurement followed by slit lamp biomicroscopy.Finally,ocular imaging was done using the Pentacam AXL to measure AL,ACD,ACV,and ACA.RESULTS:A total of 4519 eyes of 2436 participants were evaluated,of whom 58.0%(n=1412)were female.The mean age of the subjects was 67.32±6.05y(range:60-95y).The mean AL,ACD,ACV,and ACA was 23.22 mm(23.18-23.27 mm),2.61 mm(2.59-2.62 mm),126.56 mm3(125.08-128.04 mm3),and 30.61°(30.3°-30.92°),respectively.In the multivariable model,after adjusting for the effect of both eyes,the longest and shortest AL was seen in myopic and hyperopic subjects,respectively.AL,ACD,ACV and ACA were significantly larger in men compared to women(P<0.001).Except ACA,other evaluated parameters showed an inverse correlation with age(P<0.001),however,this correlation was insignificant for AL(P=0.623).CONCLUSION:Normative value of AL,and other biometric parameters are specific for each ethnicity,age and sex group.Any alteration in these parameters and their effect on refraction should be considered in this age group,especially in case of cataract surgery.

The Effects of Anterior Chamber Depth to Endothelial Cell Loss Using Tranversal Phacoemulsification

Background: Phacoemulsification surgery is the most frequent cataract surgery performed in developed countries because of its effectiveness and safety. However, some degree of endothelial loss is inevitable in any type of cataract surgery, including phacoemulsification. Anterior chamber depth (ACD) could be considered as one of important anatomical parameters for preserving endothelial loss from the mechanical and thermal damage that can occur during the procedure. Purpose: To evaluate the effects of ACD on endothelial cell density, hexagonality, coefficient variation (CV) and central corneal thickness (CCT) at one and four weeks after phacoemulsification using transversal ultrasound. Method: This was a prospective study conducted at Cicendo National Eye Hospital Indonesia from April to August 2018, where we performed phacoemulsification in 148 patients with ACD < 3 mm group, ACD ≥ 3 mm group. Specular microscopy examination was performed prior to phacoemulsification and repeated at one and four weeks after surgery. The changes in endothelial density, percentage of hexagonality, CV and CCT between two groups were evaluated and compared. Result: Mean (SD) endothelial density in ACD < 3 mm group and ACD ≥ 3 mm group at 1-week evaluation was 1761.9 (503.3) and 1966.1 (530.6) cells/mm2 respectively, with p value 0.030. At 4-week evaluation, endothelial cell density in ACD < 3 mm group and ACD ≥ 3 mm group was 1537.8 (504.9) and 1798.7 (554.0) cells/mm2 respectively, with p value 0.010. There was no statistical difference regarding hexagonality, CV and CCT between both groups at 1-week and 4-week evaluation. Endothelial density changes percentage also higher in ACD < 3 mm group at 1-week and 4-week evaluation. Conclusion: Endothelial cell density in ACD < 3 mm group was significantly lower compared to ACD ≥ 3 mm group at 1-week and 4-week evaluation after phacoemulsification.

Relationship between the Alignment of a Non-Mydriatic Fundus Camera,Anterior Chamber Depth and Axial Length

Purpose:To evaluate the relationship between the position of the focal adjustment knob of a fundus camera and refractive error and biometric data as measured in the same eye.Methods:Normal eyes of patients presenting to clinics at the Beijing Tongren Hospital were examined with a non-mydriatic fundus camera.The position on the focal scale of a knob adjusting the distance between the camera lens and film plane,used to adjust focus the image of the patients fundus relative to the refractive power of the eye,was recorded in degrees.Ocular biometry and refractometry were performed on the same eyes.Results:The study included 136 subjects with a mean age of 36.5 ±19.6 years and a mean refractive error of-1.31 ±2.77 diopters.In univariate analysis,the position of the adjustment knob was significantly associated with refractive error.(P < 0.001;correlation coefficient r=-0.77),axial length.(P<0.001;r=0.65) and anterior chamber depth (P<0.001;r=0.48).After adjustment for age,anterior chamber depth decreased by 0.01 mm(95% confidence interval:0.003,0.017) for change per degree in the position of the adjustment knob.Conclusion:A fundus camera can be used to estimate anterior chamber depth,axial length and refractive error.In a screening setting,a fundus camera operated by a technician may be helpful to detect a shallow anterior chamber and evaluate a potential risk factor for primary angle closure.

角膜宽度与前房角参数在前房角组成上的相关分析

目的观察白内障患者手术前后角膜宽度和前房角参数的变化及分析它们之间的关系。方法回顾性临床研究。纳入2021年1月至2022年3月在本院就诊的白内障患者34例(43只眼),年龄(69.03±6.61)岁(60~86岁)。应用眼科超声生物显微镜(UBM)测量所有眼术前与术后3个月时的前房宽度(ACW)、中央前房深度(CACD)、瞳孔直径(PD)、小梁虹膜角度数(TIA)、房角开放距离(AOD)和小梁网睫状突距离(TCPD)。数据均采用配对t检验进行对比分析,ACW与其它参数的相关分析应用Pearson相关和线性回归分析。结果白内障手术后3个月时的ACW、CACD、TIA、AOD和TCPD数值与术前相比差异均有统计学意义,PD差异无统计学意义。手术前ACW与CACD、TIA、AOD均无相关性,与TCPD有负相关性。结论在前房角的变化上,角膜宽度与睫状体突位置在前房角的组成上并不完全独立,而是共同在前房角的组成上趋向形成一个相对稳定但呈动态变化的结构关系。

非电离室型探测器在深度剂量扫描中的应用研究

为研究非电离室型探测器在深度剂量分布扫描中的响应特性,通过采用平板电离室、半导体和宝石探测器对医用光子束和电子束深度剂量分布进行扫描,并以平板电离室作为参考,分析比较半导体和宝石探测器在最大剂量深度、射线质等参数来探究其在深度剂量上的性能。结果表明:医用光子束下除两支探测器外,其余探测器获得的射线质与参考值的最大相对偏差为-0.67%,符合TRS-398报告高能光子束允许的不确定度1.0%,电子束<10 MeV时,各能量下非电离室型探测器获得的射线质与参考值的平均相对偏差最小为1.91%,能量≥10 MeV时,平均相对偏差最大为1.01%,除两支探测器外,其余探测器的相对偏差最大为-1.15%,符合TRS-398报告高能电子束允许的不确定度1.2%。P型半导体探测器获得的射线质与参考值的相对偏差在±0.85%内,比E型半导体探测器的相对偏差范围±0.67%大。结论:非电离室型探测器在高能光子束下影响较小,电子束<10 MeV时影响较大,能量≥10 MeV时影响较小,且尽量选择E型半导体探测器,并考虑探测器外壳材质。

晶状体超声乳化术治疗早期闭角型青光眼的效果观察

目的观察在早期闭角型青光眼治疗中使用晶状体超声乳化术所取得的治疗效果。方法选取2022年3月—2023年3月在本院接受治疗的早期闭角型青光眼患者80例为研究样本,采用随机法分两组,每组40例。采用晶状体超声乳化术治疗的作为观察组,采用周边虹膜切除治疗法的作为对照组,对比术前、后视力水平,并发症发生率,术前、后中央前房深度及眼压。结果术前,两组的视力水平对比,差异无统计学意义(P>0.05);术后,观察组的视力水平低于对照组,并发症发生率低于对照组,组间差异有统计学意义(P<0.05)。术前,两组中央前房深度及眼压对比,差异无统计学意义(P>0.05);术后,观察组中央前房深度及眼压低于对照组,组间差异有统计学意义(P<0.05)。结论在早期闭角型青光眼治疗中使用晶状体超声乳化术治疗方法,有助于改善患者视力水平,降低并发症发生率,改善中央前房深度及眼压,疾病临床治疗效果显著。

ICL植入术治疗高度近视术后早期眼前节形态的变化分析

目的探讨有晶体状眼后房型人工晶状体(ICL)植入术治疗高度近视术后早期眼前节形态的变化情况。方法选取60例(113眼)高度近视患者,均接受ICL植入术治疗。对比患者治疗前后裸眼视力、最佳矫正视力变化情况,眼前节形态变化情况[角膜厚度(CCT)、角膜曲率(K值)、中央前房深度(ACD)],角膜像差变化情况[角膜高阶像差(CHOA)、角膜低阶像差(CLOA)、角膜总像差(CTA)]。结果治疗后30 d、90 d、半年的裸眼视力、最佳矫正视力均优于治疗前(P<0.05)。治疗前及治疗后30 d、90 d、半年,角膜厚度分别为(532.50±25.40)、(532.54±23.17)、(534.64±22.55)、(532.97±24.10)μm,角膜曲率分别为(43.80±0.89)、(43.55±0.92)、(43.55±0.97)、(43.43±1.03)D,中央前房深度分别为(3.22±0.14)、(3.06±0.17)、(3.06±0.14)、(3.09±0.11)mm。与治疗前对比,治疗后30 d、90 d、半年的角膜曲率、中央前房深度均有所减小(P<0.05);治疗前后各个阶段,角膜厚度对比均无明显差异(P>0.05)。治疗后30 d、90 d、半年的CHOA均大于治疗前(P<0.05);治疗后30 d、90 d、半年的CLOA、CTA与治疗前对比均无明显差异(P>0.05)。结论高度近视患者应用ICL植入术治疗,患者的最佳矫正视力、裸眼视力均有所改善,角膜曲率变小、中央前房深度变浅、前房角变窄,患者术后早期眼前节形态良好,且较小影响角膜,安全性较高,可促进患者术后早日康复。

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.

白内障手术候选者的眼部生物特征参数分析

目的:分析白内障手术候选人的眼部生物特征参数。方法:横断面研究。纳入2017-01/2021-09就诊于伊朗德黑兰Farabi眼科医院的4607例白内障患者(4607眼)。使用IOLMaster 700评估眼轴(AL)、角膜曲率(Kf、Ks、Km)、前房深度(ACD)。根据AL分为22 mm<AL、22 mm≤AL≤25 mm和AL>25 mm组,根据ACD分为3.00 mm<ACD、3.00 mm≤ACD≤3.60 mm、ACD>3.60 mm组。结果:患者平均年龄60.3±14.1(8-95)岁,女2243例(48.69%),男2364例(51.31%)。AL、ACD和平均角膜曲率范围分别为23.1-23.4 mm、3.1-3.2 mm和44.50-45.00 D。AL>25 mm组ACD平均值显著高于22 mm≤AL≤25 mm组和22 mm<AL组(P<0.001)。ACD>3.60 mm组的平均AL显著高于3.00 mm<ACD组和3.00 mm≤ACD≤3.60 mm组(P<0.001)。3.00 mm<ACD组和AL>25 mm组的Kf、Ks、Km均值显著高于ACD>3.60 mm组和22 mm<AL组(P<0.001)。结论:AL长的白内障患者ACD更深,角膜更平坦;AL短的患者ACD较浅,角膜较陡。此外,深ACD患者的AL较长,角膜较平坦,浅ACD患者的AL较低,角膜较陡。

近视患者晶状体参数与眼部解剖特征参数的关系

目的:了解行有晶状体眼后房型人工晶状体植入术的近视患者晶状体参数与其眼部解剖特征参数的关系。方法:回顾性研究。收集2022-06/2023-06在无锡华厦眼科医院行有晶状体眼后房型人工晶状体植入术的近视患者46例46眼。术前评估眼部解剖特征参数包括角膜中央厚度(CCT)、前房深度(ACD)、眼轴长度(AL)等前后径,水平角膜直径(WTW)、水平沟到沟直径(STS_(H))、水平角到角直径(ATA_(H))等水平径,以及垂直沟到沟直径(STS_(V))、垂直角到角直径(ATA_(V))等垂直径,晶状体参数包括水平晶状体矢高(CLR_(H))、垂直晶状体矢高(CLR_(V))、水平晶状体厚度(LT_(H))、垂直晶状体厚度(LT_(V)),并分析上述参数的差异性、一致性及相关性。结果:除WTW与STS_(V)、STS_(H)与ATA_(V)无显著差异(均P>0.05)外,其余水平径与垂直径眼部解剖特征参数均有差异(P<0.05);CLR_(H)与CLR_(V)有显著差异(P<0.01),但LT_(H)与LT_(V)无差异(P>0.05)。Bland-Altman一致性分析结果显示,水平径、垂直径眼部解剖特征参数一致性较差;CLR_(H)与CLR_(V)一致性较差;LT_(H)与LT_(V)一致性较好,其差值的95%一致性界限(LoA)为-0.21-0.28 mm,95%LoA线外点比例为4.35%。Pearson相关性分析结果显示,水平径与垂直径眼部解剖特征参数间均有相关性(P<0.01),前后径参数均无相关性(P>0.05);除CLR_(H)与LT_(H)、LT_(V)无相关性外,其余晶状体参数均有相关性(P<0.05);AL与水平径和垂直径眼部解剖特征参数均具有相关性(P<0.05),但与晶状体参数均无相关性(P>0.05)。多元线性回归分析显示,LT=0.419+0.017×年龄-0.548×ACD+0.371×ATA_(H)+0.884×CLR_(V),CLR_(H)=-0.443+0.809×CLR_(V),CLR_(V)=-0.092-0.200×ATA_(H)+0.560×CLR_(H)(校正R 2=0.458、0.482、0.589)。结论:水平径、垂直径眼部解剖特征参数不可互相替代;CLR_(H)、CLR_(V)不可互相替代,而LT_(H)、LT_(V)可互相替代。部分晶状体参数、WTW、STS、ATA与ACD相关,而年龄、ACD、ATA_(H)、CLR_(V)是LT的影响因素。

中心性浆液性脉络膜视网膜病变眼部特征的研究进展

中心性浆液性脉络膜视网膜病变(CSC)是一种以特发性浆液性视网膜脱离(SRD)为特征的脉络膜视网膜疾病,伴有一处或多处视网膜色素上皮脱离(PED)或病变,具有特征性的眼球结构改变。CSC被归类为厚脉络膜相关疾病(PSD),近年来进一步发现主要为Haller层增厚。最近的研究重点关注了CSC患者的厚巩膜特征,阐述了其与脉络膜循环的密切关系,并提出CSC可能与葡萄膜渗漏综合征(UES)具有相似的发病机制。此外,CSC还具有短眼轴、远视性屈光不正、浅前房等特征,表明CSC不仅是眼球后极部的病变,而且累及全眼球。本文对CSC眼部特征的最新进展进行了综述,为进一步探究CSC发病机制提供新思路。

藏族年龄相关性白内障患者眼球生物学参数特征分析

目的:比较藏族与汉族年龄相关性白内障患者眼球生物学参数的差异,分析藏族患者眼球生物学参数的分布特征。方法:回顾性队列研究。收集2019-01/2020-12就诊于我院的年龄相关性白内障患者661例1 030眼,其中藏族患者483例739眼,汉族患者178例291眼。术前所有患者均采用IOL Master 500测量眼轴长度、前房深度、角膜曲率、散光及散光轴向。结果:藏族年龄相关性白内障患者眼轴长度为23.33(22.81,23.86)mm,前房深度为3.04(2.79,3.30)mm,散光度为0.73(0.47,1.07)D,平均角膜曲率为43.89±1.35 D,较汉族患者眼轴短,角膜曲率小(均P<0.05)。藏族患者的年龄与眼轴长度和前房深度均呈负相关,而与平均角膜曲率呈正相关(均P<0.05)。藏族患者中男性患者较女性患者眼轴更长、前房更深、角膜更平坦(均P<0.05)。结论:藏族与汉族年龄相关性白内障患者的眼球生物学参数存在差异,不同年龄和性别藏族患者眼球生物学参数的分布有所变化。

两种术式联合治疗白内障合并青光眼的疗效分析

目的探究白内障合并青光眼运用两种术式的有效性。方法选取聊城市第三人民医院于2021年2月—2023年2月收治的100例白内障合并青光眼患者为研究对象,利用随机数表法分为参照组(50例,白内障超声乳化人工晶体植入手术治疗)和研究组(50例,改良小切口非超声乳化白内障摘除人工晶状体植入与小梁切除术联合治疗),比较两组患者的眼压、视力水平及前房深度。结果术后,研究组的眼压小于参照组,视力水平优于参照组,前房深度大于参照组,差异有统计学意义(P均<0.05)。研究组术后并发症总发生率(4.00%)低于参照组(16.00%),差异有统计学意义(χ^(2)=4.000,P=0.045)。结论白内障合并青光眼运用改良小切口非超声乳化白内障摘除人工晶状体植入与小梁切除术联合治疗的效果突出,可以更好地降低术后的眼压,提高视力水平和前房深度,降低并发症发生率。