视网膜脱离行玻璃体切割术后发生视物变形的因素分析

目的:探讨玻璃体切割(PPV)术后成功复位的孔源性视网膜脱离(RRD)患者发生视物变形的危险因素。方法:回顾性临床研究。纳入2017-01/2019-01在我院确诊的RRD患者94例94眼进行研究。所有患者均行经睫状体平坦部标准23G PPV手术。首次PPV后视网膜解剖复位。于PPV术前及术后1、6、12mo,至末次随访,行BCVA、眼压、裂隙灯显微镜、间接检眼镜、视物变形评分表(M-chart表)、OCT检查,并分析发生视物变形的危险因素。结果:术后1mo,94眼中50眼(53%)存在视物变形,视物变形(+)组平均M值为0.68±0.28,累及黄斑和未累及黄斑的RRD患者发生视物变形有差异(P<0.01),术后不同随访时间M值变化有差异(F=26.442,P<0.01)。多因素Logistic回归分析结果显示:视网膜脱离累及黄斑(OR=9.020,95%CI:1.808~45.011,P=0.007)、EZ完整性中断(OR=10.570,95%CI:2.909~38.400,P<0.01)是RRD复位术后视物变形发生的独立影响因素。结论:PPV术后成功复位的RRD患者术后发生视物变形程度逐渐减轻,视网膜脱离累及黄斑和EZ完整性中断是发生视物变形的独立危险因素。

雷珠单抗治疗BRVO-ME的临床疗效及视力预后相关因素分析

目的:分析雷珠单抗治疗视网膜分支静脉阻塞继发黄斑水肿(BRVO-ME)患者黄斑区视网膜结构和功能的改善情况,并探讨影响视力预后的相关因素。方法:前瞻性临床研究。选取2018-06/2019-05于我院眼科确诊的BRVO-ME患者25例25眼,均接受每月1次,连续3次玻璃体腔注射雷珠单抗治疗。分别于治疗前和第3次玻璃体腔注射1mo后检测最佳矫正视力(BCVA),并利用相干光断层扫描成像(OCT和OCTA)技术检测黄斑中心凹厚度(CMT),评估浅层视网膜毛细血管网的血管长度密度(VLD)、血管灌注密度(VPD)、中心凹无血管区面积(FAZ),通过多焦视网膜电流图(mf-ERG)分析一环和二环(中央凹)的N1、P1波潜伏期及P1波振幅密度。结果:治疗后,本组患者BCVA(LogMAR)较治疗前显著改善(0.323±0.086 vs 0.773±0.304,P<0.05);CMT显著降低(239.385±33.175μm vs 489.346±137.453μm,P<0.05),而VLD、VPD、FAZ均无明显变化(P>0.05);一环和二环N1波潜伏期、P1波潜伏期显著降低,且P1波振幅密度值显著提高(P<0.05)。Pearson相关性分析显示,年龄、治疗前BCVA、VLD、VPD、FAZ与治疗前后视力变化值具有显著相关性(均P<0.05)。结论:玻璃体腔内注射雷珠单抗治疗BRVO-ME可显著降低黄斑水肿,改善视力及黄斑区结构和功能,年龄、基线BCVA、黄斑区微结构参数可作为评估视力改善的预测指标。

Natural history of persistent subretinal fluid following the successful repair of rhegmatogenous retinal detachment

AIM:To provide a detailed description of the natural history of persistent subretinal fluid(SRF)after successful repair of rhegmatogenous retinal detachment(RRD)and its association with visual outcome.METHODS:This was a prospective long-term follow-up for eyes undergoing scleral buckling(SB)surgery for maculaoff RRD.Examinations were carried out preoperatively and postoperatively at 1,3,6,9 and 12 mo,until persistent SRF had completely resolved.One month postoperatively,optical coherence tomography(OCT)was used to classify SRF into three patterns:bleb-like loculated(BL),shallow-diffused(SD),and multiple blebs(MB).Serial OCT imaging was used to evaluate morphological changes in SRF until its complete disappearance.Patients were divided into two groups depending on the presence or absence of persistent SRF.RESULTS:A total of 59 patients(59 eyes)were included.There were no statistical differences between two groups at baseline,except for the proportion of patients with high myopia and a younger age.One month after surgery,OCT detected persistent SRF in 49 eyes(83.1%).The 3 morphological patterns of SRF were observed in 27 eyes(55.1%)with BL,13 eyes(26.5%)with SD,and 9 eyes(18.4%)with MB.The mean time for complete absorption differed significantly across the three SRF patterns(F=8.097,P=0.001),which was 8.8±6.1,20.1±12.1,and 16.7±10.2 mo in BL,SD,and MB,respectively.In 9 of the 13 eyes with SD,the pattern transformed into MB type.In cases involving MB,the size and number of blebs decreased gradually until they had been completely absorbed.Eyes with persistent SRF were more likely to demonstrate disruption of the ellipsoid zone(49.0%vs 10%,P=0.034).The final best-corrected visual acuity of two groups was 0.37±0.11(with SRF)vs 0.34±0.12(without SRF)logMAR(P=0.499),respectively.CONCLUSION:High preoperative myopia and younger age are associated with persistent SRF.BL is the most commonly observed pattern with the shortest duration and gradually disappeared.Most cases involving SD SRF transform into MB type during resolution.The size and number of the MBs decrease gradually until they were completely absorbed.The absence of persistent SRF may contribute to slow visual recovery in the short-term but does not influence the final visual outcome.

Protective effects of umbilical cord mesenchymal stem cell exosomes in a diabetic rat model through live retinal imaging

AIM:To assess the protective effect of human umbilical cord mesenchymal stem cell exosomes(hucMSC-Exs)in a diabetic rat model by using a variety of retinal bioassays.METHODS:hucMSCs were subjected to differential ultracentrifugation for the collection of exosomes,and transmission electron microscopy(TEM),nanoparticle tracking analysis(NTA)using a NanoSight analysis system and Western blotting(WB)were used to analyze the expression of surface marker proteins such as CD63,CD9 and Calnexin.Streptozotocin(STZ)was injected into the intraperitoneal cavity to establish a diabetic model.Rats were divided into a normal group,diabetic group and hucMSC-Ex group.Fundus fluorescein angiography(FFA),optical coherence tomography(OCT)and other live imaging methods were used to observe the fundus of the rats.Finally,the eyeballs of rats from each group were collected for hematoxylin-eosin(HE)staining to further analyze the retinal structure.RESULTS:Through TEM,NTA and WB,we successfully isolated hucMSC-Exs.Subsequent FFA and OCT confirmed that hucMSC-Exs effectively prevented early retinal vascular damage and thickening of the retina.Finally,HE staining of rat retinal sections revealed that exosomes effectively alleviated retinal structure disruption caused by diabetes.CONCLUSION:hucMSC-Exs have a protective effect on the retina in diabetic rat through FFA,OCT and HE staining.

Dominant cystoid macular dystrophy associated with mutations in the RP1L1 gene

Dear Editor,We describe in detail a case of dominant cystoid macular dystrophy(DCMD)patient carrying a novel heterozygous RP1 L1 mutation.DCMD is a unique form of macular dystrophy;the appearance of cystic spaces in the macula indicates its onset,while the rest of the retina is essentially normal.