Residual refractive errors in pseudophakic eyes and related factors:a population-based study

AIM: To determine residual refractive error after cataract surgery in pseudophakic eyes and its relationship with age, sex, and axial length(AL).METHODS: In this population-based cross-sectional study, the sampling was performed on individuals aged 60y and above in Tehran, Iran using a multi-stage stratified random cluster sampling method. Pseudophakic eyes with a best-corrected visual acuity of 20/32 or better were analyzed and their refractive results were reported.RESULTS: The mean spherical equivalent(SE) refraction was-0.34±0.97 diopters(D) and the mean absolute SE was 0.72±0.74 D with a median of 0.5 D. Moreover, 32.68%(n=546, 95%CI: 30.27%-35.08%), 53.67%(n=900, 95%CI: 51.23%-56.1%), 68.99%(n=1157, 95%CI: 66.96%-71.02%), and 79.73%(n=1337, 95%CI: 77.69%-81.76%) of the eyes had a residual SE within ±0.25, ±0.50, ±0.75, and ±1.00 D of emmetropia, respectively. According to the multiple logistic regression model, increasing age was associated with a statistically significant decrease in predictability for all cut points. Moreover, the predictability based on all cut points was significantly lower in individuals with an AL longer than 24.5 mm than in those with an AL between 22 to 24.5 mm.CONCLUSION: Based on the results, the accuracy of intraocular lens(IOL) power calculation is lower for those who underwent cataract surgery during the last 5y in Tehran, Iran. Among the most important influential factors, the choice of IOL or it's power disproportionate to eye conditions and age can be mentioned.

Comparison of Artisan iris-claw intraocular lens implantation and posterior chamber intraocular lens sulcus fixation for aphakic eyes

AIM:To compare the efficacy and complications of Artisan iris-claw intraocular lens(IOL)implantation and posterior chamber IOL sulcus fixation for the treatment of aphakic eyes without capsular support after vitrectomy.METHODS:A prospective study of 45 cases was conducted.Forty-five eyes without sufficient lens capsule support following pars plana vitrectomy(PPV)combined lens extraction were divided into two groups.Group A:25 eyes received Artisan iris-claw IOL implantation.Group B:20 eyes received posterior chamber IOL sulcus fixation.The corrected distance visual acuity(CDVA)and intraocular pressure(IOP),corneal endothelial cell loss rate,surgical time and complications were compared between the two groups.Pigment changes of trabecular meshwork and anterior chamber depths were measured at each time point in Artisan group.RESULTS:The mean surgical time of Artisan group was significantly shorter(P【0.05).No statistically significant difference in endothelial cell loss rate was noted between two groups at any time point(P】0.05).CDVA of Artian group was better than that of the sulcus fixation group 1d after surgery(P【0.05)and there was no statistically significant difference 1 and 3mo after surgery(P】0.05).Mean IOP showed no significant differences between groups before and after surgery.The postoperative complications of Artisan group were anterior uveitis,iris depigmentation,pupillary distortion and spontaneous lens dislocation.The complications of sulcus fixation group include choroidal detachment,intraocular haemorrhage,tilt of IOL optic part and retinal detachment.CONCLUSION:Secondary Artisan IOL implantation canbe performed less invasively and in a shorter surgical time period with earlier visual recovery after surgery compared to transscleral suturing fixation of an IOL.This technique is an effective and safe procedure.It is a promising option for the treatment of aphakic eyes without capsular support after vitrectomy.

A systematic review of pseudophakic monovision for presbyopia correction

A systematic review of the recent literature regarding pseudophakic monovision as a reliable methods for presbyopia correction was performed based on the PubMed, MEDLINE, Nature and the American Academy of Ophthalmology databases in July 2015 and data from 18 descriptive and 12 comparative studies were included in this narrative review. Pseudophakic monosvision seems to be an effective method for presbyopia with high rates of spectacles independence and minimal dysphotopsia side- effects, that should be considered by the modern cataract surgeons.

Trabeculectomy with Ologen implant versus perfluoropropane gas bubble for open angle glaucoma in pseudophakic eyes

AIM:To evaluate the safety and efficacy of augmented trabeculotomy with Ologen versus perfluoropropane in management of pseudophakic glaucoma.METHODS:This is a comparative randomized study included 57 pseudophakic eyes of 57 patients with medically uncontrolled open angle glaucoma(OAG).Twentynine patients were allocated in group I(trabeculectomy with Ologen;trab-ologen group),while 28 patients were assigned in group II(trabeculectomy with perfluoropropane gas bubble;trab-C3 F8 gas bubble group).RESULTS:The intraocular pressure(IOP)was significantly reduced in both study groups at all postoperative follow up intervals(1 wk,3,6,12,18,24,30 and 36 mo,P<0.001).The differences between the mean IOP values of both groups remained statistically insignificance during the early 12 months of follow up.However,the trab-ologen group achieved a statistically significant reduction over the trab-C3 F8 gas bubble group during the last 24 months of follow up.CONCLUSION:Augmentation of trabeculectomy with either Ologen implant or perfluoropropane gas bubble are associated with strict long term IOP control and evident safety in medically-uncontrolled pseudophakic eyes with OAG.

Goniosynechialysis for secondary angle closure glaucoma in a pseudophakic patient after vitrectomy and silicone oil injection

Dear Sir,Iam Jonghoon Shin,from the Department of Ophthalmology of Pusan National University Hospital,Busan,Korea.I write to present a patient with secondary angle closure glaucoma(SACG)after vitrectomy and silicone oil(SO)injection who was successfully treated by

Combined Descemet stripping automated endothelial keratoplasty and intravitreal dexamethasone implant for concomitant pseudophakic bullous keratopathy and cystoid macular edema

Dear Editor,Endothelial cell density decreases with age and in various ocular conditions,including corneal endotheliitis,uveitis,pseudoexfoliation syndrome,and birth injury(1)The reduction of endothelial cell density is exacerbated over time after intraocular surgery(1)Descemet stripping automated endothelial keratoplasty(DSAEK)is considered the primary procedure for patients with only endothelial dysfunction.

Selective laser trabeculoplasty in pseudophakic and phakic eyes:a prospective study

AIM：To compare the efficacy of selective laser trabeculoplasty（SLT） in replacing medical therapy in pseudophakic and phakic eyes.METHODS：Subgroup of a prospective randomized clinical trial including patients with primary open angle glaucoma or ocular hypertension controlled with medication.Of 38 pseudophakic eyes were matched with 38 phakic eyes.SLT was offered as a way to decrease medication while maintaining the same low eye pressure.SLT was performed over 360°,at 3ns,spotsize 400 μm,100 spots.Data [intraocular pressure（IOP）,number of medications needed] were measured at 1h,1wk,1,3,6 and 12 mo.An independent-samples t-test was performed to compare baseline characteristics of the phakic and the pseudophakic group and differences in evolution of mean IOP and number of used medications.Chi-squared analysis was performed to investigate proportions of fast,slow and non-responders.RESULTS：The mean IOP measurement was 13.00± 2.88 mm Hg in the phakic group（38 eyes） and 13.51±3.06 mm Hg in the pseudophakic group（38 eyes）（P〉0.05）.This changed little after SLT and IOP lowering effect was comparable between the two groups.Main aim however was to lower the amount of medication needed.In the phakic group medication lowered from 1.29±0.62 at baseline,to 0.15±0.46 after 12mo;a reduction of 88.37%.In the pseudophakic group,used medication changed from 1.71±1.04,to 0.41±0.61;a 76.02% reduction.The differences were not statistically significant at any time point（P〉0.05）.IOP lowering occurred slightly faster in thepseudophakic group（50% of patients after one week） than in the phakic group（68% of patients after more than 4wk）.The difference was not significant（P〉0.05）.CONCLUSION：IOP lowering effect of SLT is comparable between phakic and pseudophakic eyes.

Evaluation of the Changes in Anterior Segment Morphology with Ultrasound Biomicroscopy after Vitrectomy without Use of Tamponade in Pseudophakic Eyes

Aim: In this study we investigated the changes in anterior segment morphology in pseudophakia patients that underwent ultrasound biomicroscopy (UBM) after pars plana vitrectomy (PPV) operation without use of tamponade. Method: Pseudophakic patients who undergo PPV were enrolled in this prospective study between October 2012 and April 2015. Study included patients in whom intraocular tamponade was not used during PPV operation. UBM measurements were performed both before and 10 days after the operation. Anterior chamber depth (ACD) was measured using axial images of anterior segment. Trabecular meshwork-iris angle (TIA), ciliary body thickness (CBT), sclera thickness (ST), trabecular meshwork-ciliary process distance (T-CPD), iris-ciliary processes distance (I-CPD), and iris thickness (IT) were measured at temporal quadrant based on radial section images of the angle. Values measured before and after the operation were statistically compared with each other. Results: This study included 30 patients (18 females, 12 males) that underwent an operation ultrasound biomicroscopy (UBM) after pars plana vitrectomy (PPV) operation without use of tamponade. Mean age was 69.6 ± 9.1 (55 - 85) years. Eighteen operations occurred on the left eye whereas twelve operations occurred on the right eye. CBT1, CBT2, CBT Max, T-CPD, and I-CPD were significantly decreased after operation when compared with the values of baseline (before) (p = 0.018, p = 0.012, p = 0.001, p = 0.033, p = 0.015, respectively). Other evaluated parameters did not show statistically significant changes after the operation (p > 0.05). Discussion: PPV results in significant changes in ciliary body morphology together with changes in anterior segment parameters in pseudophakic cases.

Coreoplasty and Artisan Intraocular Lens Implantation for Mydriasis and Aphakic Correction in Post-traumatic Vitrectomized Eyes

Purpose:.To evaluate the efficacy and safety of using coreoplasty,.and an iris-supported Artisan intraocular lens (IOL), for mydriasis and aphakic correction in post-traumatic vitrectomized eyes. Methods:.A total of 17 aphakic patients were admitted between April 2009 and April 2010 to the ophthalmologic department of Xiamen Eye Centre..All eyes had previously received lens removal and vitrectomy. After the retina stabilized and corrected visual acuity improved,.the iris was sutured. The Artisan IOL was fixated onto the iris surface..Patients were followed-up at one day, one week,.one month and three months postoperatively..The following outcomes were assessed: symptoms of photophobia and glare, uncorrected visual acuity (UCVA), best-corrected visual acuity (BCVA), intraocular pressure (IOP), endothelial cell density (ECD). The diameter of pupil and the anterior chamber depth (ACD) were measured by the anterior segment optical coherence tomography (OCT). Results:.Artisan IOLs were successfully implanted in all aphakic eyes. Postoperatively, improvement was observed in photophobia and glare symptoms..UCVA was enhanced in all patients.(six eyes had better UCVA postoperatively than BCVA preoperatively)..However,.there were no significant changes in IOP. Mean loss of ECD was 336.06/mm2. Mean postoperative pupil diameter was 3.67±0.41 mm, compared with 5.67±0.57 mm preoperatively(P<0.05). Mean ACD was reduced by 0.88 mm.(3.38±0.33 mm preoperatively vs 2.50±0.35 mm postoperatively, P<0.05). Conclusion:.Surgery that combined coreoplasty and Artisan IOL implantation was a safe and effective treatment for correcting aphakia and mydriasis in post-traumatic vitrectomized eyes.

玻璃体腔注射曲安奈德治疗白内障术后人工晶状体眼黄斑囊样水肿的效果

目的探讨玻璃体腔注射曲安奈德治疗白内障术后人工晶状体眼黄斑囊样水肿(PCME)的效果。方法选取2018年8月至2021年12月收治的15例(15眼)白内障术后PCME患者作为研究对象,给予玻璃体腔注射曲安奈德治疗。比较患者注药前、注药后不同时间点的最佳矫正视力(BCVA)、眼压、黄斑中心凹厚度(CMT)和并发症发生情况。结果患者注药前、注药后1 d及1、3、6个月的BCVA比较,差异具有统计学意义(P<0.05);注药后1 d及1、3、6个月,患者的BCVA优于注药前(P<0.05);注药后1、3、6个月,患者的BCVA优于注药后1 d(P<0.05)。注药前、注药后1 d及1、3、6个月的眼压比较,差异无统计学意义(P>0.05)。注药前及注药后1、3、6个月的CMT比较,差异具有统计学意义(P<0.05);注药后1、3、6个月,患者的CMT小于注药前(P<0.05)。注药后1 d及1、3、6个月,所有患者未出现眼部和全身并发症。结论玻璃体腔注射曲安奈德能安全、有效地降低白内障术后PCME患者的黄斑水肿程度,改善视力。

前房型虹膜夹人工晶状体植入术治疗无足够囊膜支撑的无晶状体眼的疗效和安全性

目的探讨前房型虹膜夹人工晶状体植入术治疗无足够囊膜支撑的无晶状体眼的疗效和安全性。方法选择河北省眼科医院白内障科2013年1月至2020年12月行晶状体摘出一期或二期植入前房型虹膜夹人工晶状体的患者53例62眼作为研究对象,62眼患者均为无足够囊膜支撑的无晶状体眼。术后随访3~9(5.68±1.29)年,收集患者手术前和末次随访裸眼视力(UCVA)、等效球镜度、眼压、前房深度、人工晶状体眼内固定位置及稳定性、角膜内皮细胞密度(ECD)、术后并发症等指标和临床信息。评价前房型虹膜夹人工晶状体植入术治疗无足够囊膜支撑的无晶状体眼的疗效和安全性。结果术前62眼UCVA(logMAR)为1.55±0.56,术后为0.23±0.15,术后UCVA较术前显著提高(t=18.64,P=0.00)。术后和末次随访UCVA(logMAR)(0.22±0.14)比较,差异无统计学意义(t=1.43,P=0.16),患者术后视力保持稳定。术后末次随访1眼等效球镜度为-1.25 D(为根据另一眼预留),等效球镜度-1.00~<-0.50 D者10眼,-0.50~+0.50 D者51眼。62眼术前眼压为(14.20±2.20)mmHg(1 kPa=7.5 mmHg),其中12眼于术后第1天开始出现眼压升高,达28.0~40.3 mmHg(主要原因是黏弹剂眼内残留并继发青光眼,经过降眼压处理后,眼压于3 d内恢复至正常范围);末次随访眼压为(13.92±2.10)mm⁃Hg,术前与末次随访眼压差异无统计学意义(t=0.25,P=0.90)。术前62眼ECD为(2826.3±489.8)个·mm^(-2),末次随访为(2474.3±397.6)个·mm^(-2),术前和末次随访ECD差异有统计学意义(t=6.82,P=0.00)。一期脱位晶状体或人工晶状体摘出联合前房型虹膜夹人工晶状体植入术后41眼ECD平均下降11.25%,二期前房型虹膜夹人工晶状体植入术后21眼ECD平均下降5.23%。术后共5眼ECD减少超过15%,均为开展手术早期的前5例患者。末次随访62眼前房深度为(2.40±0.32)mm,裂隙灯眼前节照相系统动态检查及眼前节OCT静态检查人工晶状体周边部和角膜内皮之间均无接触。术后ECD减少超过15%的5眼中,3眼发生人工晶状体一侧襻脱位;2眼因虹膜夹夹取的虹膜组织较少进行了再固定手术。再固定手术后人工晶状体在眼内位置稳定,再固定后的患者未再发生脱位。结论前房型虹膜夹人工晶状体植入术可有效改善无足够囊膜支撑的无晶状体眼患者中远期术后视功能,稳定眼压;术中虹膜夹人工晶状体襻必须充分夹取虹膜组织,才能维持其远期稳定性;术后需长期关注人工晶状体位置及角膜内皮变化,防止角膜内皮细胞减少。

Artisan虹膜夹持型人工晶状体植入术及后房型人工晶状体睫状沟缝线固定术治疗无晶状体眼的比较

目的:比较Artisan虹膜夹持型人工晶状体植入术及后房型人工晶状体睫状沟缝线固定术治疗无晶状体眼的疗效及并发症。方法:2007-03/2009-03我院住院患者中连续24例24眼无后囊膜支持的无晶状体眼患者,随机分为两组。一组11眼行Artisan虹膜夹持型人工晶状体植入术,另一组13眼选择后房型人工晶状体睫状沟缝线固定术。观察手术前及手术后1d;1wk;1mo的裸眼视力(visual acuity,VA)、最佳矫正视力(best corrected visual acuity,BCVA)、眼压(intraocularpressure,IOP)、角膜内皮细胞计数(corneal endothelial cells,CECs)。结果:两组间比较,术前VA,BCVA,CECs差异无统计学意义,术后BCVA,CECs差异无统计学意义。Artisan组手术后VA优于术前BCVA,差异有统计学意义。睫状沟缝线固定组手术后VA与手术前BCVA差异无统计学意义。两组手术前后IOP差异无统计学意义。结论:Artisan虹膜夹持型人工晶状体植入术与后房型人工晶状体睫状沟缝线固定术都是治疗无晶状体眼有效方法。两者比较,Artisan虹膜夹持型人工晶状体植入术手术操作相对简单,组织损伤小,更加安全,是治疗无后囊膜支持的无晶状体眼的比较理想的治疗方法。

白内障术后视网膜脱离分析

目的探讨白内障术后视网膜脱离的病因,临床特点及手术方法。方法回顾性分析10例(10眼)白内障术后发生视网膜脱离病例。结果平均发病时间为白内障术后28月,其中6例发生在白内障术后1年内;8例有中高度近视史,其中6例为高度近视。视网膜脱离分级PVR B至C3级。9例采用巩膜环扎术,1例结合玻璃体切除术,术后平均随访11.8月,均解剖性复位,视力恢复较理想。结论白内障摘出术中应尽量保持晶状体后囊的完整并避免后发障等术后并发症的发生。对于术前有高度近视史、外伤史,术中发生后囊破裂,术后行后囊截开者,散瞳随访眼底有助于预防和及时诊治视网膜脱离。

玻璃体腔注射改良低剂量曲安奈德治疗白内障术后黄斑囊样水肿

目的:探讨玻璃体腔注射改良低剂量曲安奈德(TA)治疗白内障术后黄斑囊样水肿(PCME)的疗效。方法:回顾性分析。选取2015-01/2018-12于我院就诊的典型PCME患者12例12眼行玻璃体腔注射改良低剂量TA。通过0.22μm的滤膜将TA混悬液置换成眼内灌注液,取置换后的TA溶液2mg/0.05mL注射。观察注药后2wk,1、3、6mo的最佳矫正视力、黄斑中央厚度、眼压、局部和全身并发症。结果:与注射前比较,所有患者注药后视力均显著提高;黄斑中央厚度显著减低(P<0.05),而眼压无明显升高(P>0.05),所有患者均未观察到眼部及全身并发症。结论:玻璃体腔注射改良低剂量TA治疗PCME安全、有效,克服了以往导致眼压升高的副作用,价格低廉,能够使患者受益。但尚需大宗病例的临床随机对照研究和长期疗效的随访观察。

人工晶状体眼视网膜脱离的临床特征及其治疗观察

目的探讨人工晶状体眼视网膜脱离的临床特点及手术效果。方法回顾性分析2010年8月至2013年3月间在我院住院行手术治疗的56例(56只眼)人工晶状体眼视网膜脱离患者的临床资料。其中男27例(27只眼),女29例(29只眼)。年龄7~77岁,平均47.5岁。病史2 d^6个月。所有视网膜脱离患者均为后房型人工晶状体。术前视力:光感~指数者34只眼,0.02~<0.1者10只眼,0.1~<0.2者6只眼,0.2~<1.0者6只眼。增生性玻璃体视网膜病变(PVR)分级:PVRB级37只眼,PVRC1~C3级16只眼,PVRD级3只眼。术前26只眼发现明确视网膜裂孔(其中黄斑裂孔或黄斑裂孔合并有周边孔的5只眼,其余21只眼)。33只眼后囊膜完整,23只眼后囊膜不完整或悬韧带离断(4只眼伴有人工晶状体偏移)。行巩膜外垫压(或联合环扎)9只眼,占16.1%。单纯玻璃体内注气1只眼,占1.8%。玻璃体切割手术46只眼,占82.1%,其中硅油填充38只眼(67.9%),长效气体C3F8填充8只眼(14.3%)。玻璃体手术中5只眼术中人工晶状体取出。结果术后随访3个月~2年。最终矫正视力:光感~指数者25只眼,0.02~<0.1者16只眼,0.1~<0.2者8只眼,0.2~<1.0者7只眼。行巩膜外垫压(或联合环扎)的9只眼中8只眼视网膜复位良好,1只眼视网膜复位不良再次行玻璃体手术并硅油填充后复位。单纯玻璃体内注气的1只眼视网膜复位良好。玻璃体手术并硅油填充的38只眼中3只眼术后2周内硅油进入前房,行前房穿刺部分硅油取出后前房仍有硅油滴,3个月后硅油完全取出。最终12只眼取出硅油,其中11只眼视网膜复位良好,1只眼视网膜脱离复发再次硅油注入后视网膜仍复位不良硅油维持。26只未取出硅油者4只眼视网膜复位不良,其余患者硅油未见明显乳化,无其他严重并发症发生。玻璃体手术并C3F8填充的8只眼中,7只眼视网膜复位良好,1只眼视网膜复位不良再次硅油填充复位。一次手术后50只眼(89.2%)视网膜复位良好(34只眼为硅油填充状态)。最终51只眼(91.1%)视网膜复位良好(24只眼为硅油填充状态)。结论人工晶状体眼视网膜脱离由于术前裂孔发现率较低,机化囊膜及人工晶状体的影响,手术方案选择受到一定限制,根据自身特点,采取个体化方案,选择巩膜外垫压(或环扎)或玻璃体手术可以取得一定效果。

小切口两点固定折叠人工晶状体悬吊术的临床观察

目的:探讨小切口对无后囊膜无晶状体眼行两点固定折叠人工晶状体缝线悬吊术的临床疗效。方法:对11例11眼无后囊膜或后囊膜不足以支撑人工晶状体的患者用RAYNER(570C)折叠式人工晶状体,通过小切口两点固定行折叠人工晶状体悬吊术,观察患者术后视力、并发症情况。结果:术后1d裸眼视力>0.5者5眼(46%),0.3～0.5者4眼(36%),2眼(18%)为0.2。术后1,3,6mo视力均达到或好于术前最佳矫正视力。无明显并发症发生。结论:小切口两点固定折叠人工晶状体悬吊术是治疗无囊膜无晶状体眼的一种安全有效的方法。

人工晶状体眼调节功能研究进展

近年来对拟调节功能的研究成为眼科领域关注的热点。现综述众多学者人工晶状体眼拟调节功能的研究,包括区分调节和拟调节的概念、人工晶状体植入术后拟调节力的影响因素;并概述具有拟调节功能的人工晶状体发展近况。

一种无晶状体眼内硅油取出的改良手术(英文)

目的:报道并演示一种简便的改良手术方式取出无晶状体眼内的硅油。方法:对既往进行了玻璃体切割、晶状体切除及硅油填充术的18例患者(18眼),采用自闭式透明角膜切口取出其眼内硅油。结果:所有18眼的眼内硅油均能成功取尽,并发症少且角膜切口无须缝合。结论:采用自闭式的透明角膜切口能有效地取出无晶状体眼内的硅油。

人工晶状体眼硅油入前房继发青光眼的预防与处理

目的探讨人工晶状体眼硅油入前房继发青光眼的预防与处理方法。方法对人工晶状体眼视网膜脱离患者12例,在行玻璃体切割硅油填充术后,有硅油入前房继发青光眼者,行Healon注入前房、硅油排出,常规作6点位虹膜周边切除术。结果12眼眼压恢复正常,人工晶状体位正,硅油及视网膜在位,未见不良并发症。结论采用Healon注入、硅油排出联合6点位虹膜周边切除术是治疗人工晶状体眼硅油入前房继发青光眼的有效方法,应采取积极措施预防该并发症的发生。

波前像差对术后晶状体后囊膜混浊诊治的临床意义

目的探讨波前像差在白内障超声乳化吸除联合人工晶状体植入术后晶状体后囊膜混浊患者视功能评价中的意义。方法收集于我院就诊的晶状体后囊膜混浊患者33例(38只眼),最佳矫正视力≥0.6,排除眼部合并有其他疾病史及i Trace视觉功能分析仪不能准确测量的患者,行Nd:YAG激光晶状体后囊膜切开术(晶状体后囊膜切开直径约为5 mm)。分别于手术前后进行波前像差检查,并进行统计学分析。结果术前与术后最佳矫正视力的差异无统计学意义(P>0.05),术后1 h眼压、房水荧光值与术前比较,差异均无统计学意义(P>0.05)。术后球镜度、波前像差中总像差、总高阶像差均较术前明显下降(3.0和5.0 mm瞳孔下),差异有统计学意义(P<0.05)。术后3个月无视网膜脱离、黄斑囊样水肿和人工晶状体移位等并发症发生。结论波前像差可灵敏、客观地反映人工晶状体眼合并晶状体后囊膜混浊的视功能状态,可为Nd:YAG激光治疗人工晶状体眼后囊膜混浊手术时机的选择提供参考依据。