Treatment frequency and visual outcome in subfoveal choroidal neovascularization related to pathologic myopia treated with photodynamic therapy

Background The purpose of this study was to examine the influence of treatment frequency on visual acuity of patients with PDT treatment for subfoveal predominantly classic CNV related to pathological myopia.Design Retrospective case series.Methods Thirty-seven patients with subfoveal predominantly classic CNV caused by pathologic myopia and treated with PDT were included. All patients received a full ophthalmic examination, including best-corrected visual acuity, slit-lamp biomicroscopy, fundus photography and fluorescein angiography, before first treatment and every 3 months thereafter. Photodynamic therapy was performed according to standard protocol. Main outcome measurements were visual acuity and treatment frequency.Results The number of treatments received was 3.35±1.83 (average: 1–7). In 12 eyes (32.43%); the BCVA was stable or increased during the entire follow-up period. In eight eyes (21.62%), the BCVA decreased and did not return to the baseline values. A transient loss of visual acuity (over 3–9 months) with subsequent improvement in visual function was found in 68% (17 eyes). A gain of three or more lines compared with lowest BCVA was found in 56% (14 eyes). The number of treatments did not correlate with baseline BCVA, greatest linear dimension of CNV at baseline or with the change of BCVA from baseline. In cases with transient worsening of BCVA, the recovery of visual acuity correlated significantly with the number of treatments (r=−0.522, P<0.05; Spearman rank correlation) received.Conclusion Visual acuity recovery correlates with the number of PDT re-treatments; in many cases, an improvement in visual function after temporary decrease of BCVA can be observed after re-treatment according to current treatment guidelines. The number of PDT treatments has no negative effect on the visual outcome in subfoveal CNVs caused by pathological myopia.     

Estimation of visual outcome without treatment in patients with subfoveal choroidal neovascularization in pathologic myopia

Objective To clarify prognostic factors of long-term visual outcome without treatment in patients with myopic choroidal neovascularization (CNV) and estimate a regression equation to predict visual acuity at 5 years after CNV onset. Methods Fifty-four eyes of 54 consecutive patients with high myopia and subfoveal CNV who did not receive treatment were identified using clinical records from 1988 to 2004. Photodynamic therapy not approved for myopic CNV in Japan during this period. The association of best-corrected visual acuity (BCVA) at 5 years after CNV onset with patient age, refractive error, axial length, initial BCVA, myopic retinopathy grade, duration of persistent hemorrhage, CNV size at onset, and size of hemorrhage around the CNV was analyzed using Spearman’s correlation and multiple linear regression analysis. Results BCVA at 5 years after onset was significantly associated with patient age, CNV size, and initial BCVA (P<0.05, Spearman’s correlation). The regression equation estimating BCVA at 5 years after CNV onset was based on age and initial BCVA (R ²=0.43). When subjects were divided into groups according to age (<40 and ≥40 years), CNV size, axial length and duration of persistent hemorrhage influenced BCVA at 5 years in patients under 40 years; while only initial BCVA was an influence in those at least 40 years old. Conclusions We developed a linear predictive model to estimate BCVA at 5 years after onset of myopic CNV without treatment based on the identified prognostic factors. This information might be important for managing patients with myopic CNV. The authors have no financial interest in any products/drugs discussed in this article. This study was supported in part by research grant 16390495 from the Japan Society for the Promotion of Science, Tokyo, Japan.     

Two years follow-up outcome of verteporfin therapy for subfoveal choroidal neovascularization in pathologic myopia in Indian eyes

Context:

In India, refractive errors are a major cause of treatable blindness. Population surveys in southern India have shown prevalence of high myopia to be 4.32-4.54%. Photodynamic therapy (PDT) for choroidal neovascularization (CNV) caused by pathologic myopia is beneficial.

Aims:

To report the 24 months outcome of PDT with verteporfin for subfoveal CNV caused by pathologic myopia in Indian eyes

Settings and Design:

Prospective case series

Materials and Methods:

Review of prospectively collected data of Indian patients with pathologic myopia and subfoveal CNV treated with verteporfin therapy between 2001 and 2005 using standard regimen for PDT.

Statistical Analysis Used:

Wilcoxon signed rank test was used to see the difference in the mean letter acuity at intervals compared to baseline. Kaplan Meier Survival analysis was done to estimate the success rate of verteporfin therapy for CNV caused by pathologic myopia.

Results:

Fifteen patients (15 eyes) treated with standard fluence PDT and who had completed 24 months follow-up were analyzed. The mean spherical equivalent was -13.36 ± 5.88 diopter. Five out of 15 eyes in six months, three out of 15 eyes at 12 months and four eyes out of 15 at 24 months had improved vision by > 10 letters. The mean number of treatment session was 2.2 in two years.

Conclusions:

PDT with verteporfin for subfoveal CNV caused by pathologic myopia in Indian eyes is effective.     

PDT联合AVASTIN玻璃体腔注射治疗高度近视性黄斑区CNV观察

目的 观察光动力疗法(PDT)联合AVASTIN玻璃体腔注射治疗高度近视性黄斑区脉络膜新生血管(CNV)的临床效果.方法 经眼底荧光血管造影(FFA)和吲哚青绿(ICGA)检查确诊为高度近视性黄斑区CNV患者26例26只眼,非随机选取12例12只眼仅行光动力疗法,14例14只眼先行AVASTIN 1.25mg玻璃体腔注射,1周后行光动力治疗,治疗后1、3、6个月复诊,记录最佳矫正视力、症状变化、FFA及黄斑区的情况,对治疗前1天和治疗后6个月的最佳矫正视力、自觉症状进行比较分析.结果 6个月后,Amsler方格表检查PDT组4只眼症状消失,6只眼减轻或不变,2只眼加重;联合治疗组7只眼症状消失,6只眼减轻或不变,1只眼加重.最佳矫正视力,PDT组6只眼视力提高1行以上,4只眼视力不变,2只眼视力下降1行以上;联合治疗组10只眼视力提高1行以上,3只眼视力不变,1只眼视力下降1行以上.2组患者在消除或减轻症状、提高或稳定视力等方面进行组间Fisher精确检验,P＞0.05,差别均无统计学意义.结论 光动力疗法联合AVASTIN玻璃体腔注射治疗治疗高度近视性黄斑区CNV,在消除或减轻患者的自觉症状、提高或稳定患者的视力方面,较单纯光动力疗法(PDT)均无明显差别.     

Outcome of photodynamic therapy in choroidal neovascularization due to pathologic myopia and related factors

To evaluate the outcome of photodynamic therapy (PDT) and the factors influencing its outcome in patients with subfoveal choroidal neovascularization (CNV) due to pathologic myopia. Twenty-three eyes of 21 consecutive patients who received PDT for subfoveal CNV due to pathologic myopia and who were followed for >12 months were included in the study. The relationship between the factors that might affect the treatment outcome were evaluated. Mean age was 48.7 ± 16.0 years (23–74 years). Mean follow-up was 23.2 ± 7.7 months (15–41 months). Mean logMAR visual acuity was 0.85 ± 0.24 before treatment, 0.89 ± 0.37 at 12 months, and 0.92 ± 0.46 at the final visit. Mean logMAR visual acuity did not change significantly at 12 months or at the final visit (P = 0.47 and 0.36, respectively). The baseline visual acuity strongly correlated with the final visual acuity (P = 0.001). Age showed an inverse correlation with change in logMAR visual acuity at 12 months (P = 0.01). PDT prevented significant visual loss in eyes with subfoveal CNV due to pathologic myopia. Better initial visual acuity resulted in better final visual acuity. Younger age was correlated with better treatment outcome at 12 months.     

Twofold illumination photodynamic therapy scheme for subfoveal choroidal neovascularization in pathologic myopia: results from a randomized pilot study

PURPOSE: To compare the short-term efficacy and safety of standard verteporfin photodynamic therapy (PDT) to modified PDT regimen using a twofold illumination scheme for treating choroidal neovascularization in pathologic myopia. METHODS: Randomized active-controlled clinical trial including 16 patients with subfoveal choroidal neovascularization caused by pathologic myopia and best-corrected visual acuity (BCVA) of 20/320 or better. Patients were randomly assigned (1:1) to standard PDT regimen (50 J/cm; n=8) or twofold illumination PDT scheme (50+50 J/cm; n=8). Comprehensive ophthalmic evaluation including fluorescein angiography was performed at baseline and at weeks 1, 12+/-2, and 24+/-2 following treatment. At week 12 follow-up examination, an additional treatment session with either standard or modified PDT regimens (as assigned at baseline) was applied to areas of fluorescein leakage if present. Changes in BCVA, retreatment rate, and incidence of adverse events were evaluated. RESULTS: All patients completed the 24-week study period. Baseline median BCVA was 20/100 and 20/100 for patients assigned to standard and modified PDT regimens, respectively. At week 24, median improvement in BCVA was significantly greater in patients submitted to twofold illumination PDT scheme (P=0.005; Mann-Whitney U test). Median change from baseline in BCVA (ETDRS lines) was +1.8 (P<0.05; Wilcoxon signed-rank test), +0.4, and +0.5 lines for patients submitted to standard PDT regimen, and +1.8 (P<0.05; Wilcoxon signed-rank test), +1.9 (P<0.05; Wilcoxon signed-rank test), and +2.4 (P<0.05; Wilcoxon signed-rank test) lines for patients submitted to twofold illumination PDT scheme at week 1, 12, and 24 follow-up examinations, respectively. An additional PDT session was performed in 7/8 patients assigned to standard PDT regimen, and in 4/8 patients assigned to modified PDT (P=0.28; Fisher exact test). No PDT-related complications were observed. CONCLUSION: Although the number of patients and length of follow-up in this study was limited, a better visual outcome and diminished retreatment rate were observed in patients assigned to twofold illumination PDT scheme in comparison to those submitted to standard PDT regimen. Larger studies with longer follow-up to look at twofold illumination PDT scheme versus standard one to confirm our preliminary results are warranted.     

光动力疗法治疗病理性近视所致黄斑部CNV的临床疗效观察

目的:评价光动力疗法(photodynamic therapy,PDT)治疗病理性近视所致黄斑部脉络膜新生血管(choroidal neovascularization,CNV)的临床疗效。方法:回顾性分析20例21眼临床确诊为病理性近视合并CNV患者的临床资料,对比分析PDT治疗前后患者最佳矫正视力(BCVA)、固视性质,FFA/ICGA和OCT等检查结果的变化。结果:PDT治疗后随访6mo,1例患者PDT治疗后3mo因玻璃体积血行玻璃体切除手术,未继续随访。其余患者BCVA与治疗前相比明显提高,差异具有统计学意义(P<0.05)。PDT治疗前中心固视3眼,中心外固视18眼,随访期间固视性质未发生改变。FFA/ICGA检查显示,PDT治疗后3mo,CNV病灶渗漏停止或渗漏减少者18眼(86%),持续渗漏2眼(10%),1眼出现玻璃体积血。PDT治疗后6mo,CNV病灶渗漏停止或渗漏减少者19眼(90%),持续渗漏1眼(5%),OCT显示CNV缩小,组织水肿减轻。结论:PDT治疗可以部分或完全封闭病理性近视所致脉络膜CNV,减少CNV引起的视力下降危险性。     

频域OCT在光动力疗法治疗病理性近视脉络膜新生血管中的应用

目的 评价频域光学相干断层扫描(optical coherence tomography,OCT)检查在光动力疗法(photodynamic therapy,PDT)治疗病理性近视所致的黄斑区脉络膜新生血管(choriodal neovascularization,CNV)中的临床应用价值.方法 对比分析21例26眼病理性近视患者PDT治疗前后频域OCT图像中黄斑中心凹层间厚度及外层高反射厚度,观察不同时期OCT的形态变化.结果 26眼CNV生长方式均属于Ⅱ型.PDT治疗后6个月18眼视网膜层间厚度恢复,视网膜下液吸收,CNV反光团逐渐缩小或纤维化,中心凹形态恢复.黄斑中心凹层间厚度治疗后1周(339.96±74.40)μm增加,治疗后1个月(267.78±33.39)μm开始下降,且差异均有统计学意义(均为P＜0.05).外层高反射厚度与术前(247.33±49.31)μm相比,从治疗后1个月(226.73±83.15)μm开始明显减少,但仅治疗后6个月(165.15±22.90)μm时差异有统计学意义(P=0.042).结论 频域OCT对病理性近视CNV行PDT治疗前后视网膜形态结构的连续观察具有重要意义,为临床治疗提供一种安全、无损伤的检测方法.     

Result of photodynamic therapy for idiopathic subfoveal choroidal neovascularization

PURPOSE: To investigate the factors that affect final vision following photodynamic therapy (PDT) for idiopathic subfoveal choroidal neovascularization (CNV). METHODS: A retrospective review of 16 patients whose eyes were diagnosed as idiopathic subfoveal CNV and were followed up for a minimum of 9 months. Statistical analysis was performed to investigate relationships between sex, age, size of the lesion, and initial vision compared to final vision. RESULTS: In the PDT group (10 eyes), the mean age of the patients was 34 years, mean size of the lesion was 1300 microm, mean initial vision was 20/60, and 7 of the 10 patients (70%) showed more than a two-line improvement in vision. Factors affecting final vision were sex (p=0.049), initial vision (p=0.0455), and size of the lesion (p=0.006). In the observation group (6 eyes), the mean age of the patients was 39 years, mean size of the lesion was 575 microm, mean initial vision was 20/32, and 5 of the 6 patients (83%) showed more than a two-line improvement in vision. CONCLUSIONS: The prognosis of idiopathic CNV was favorable as was reported in other studies. In the PDT group, statistically significant factors affecting final vision were initial vision, size of the lesion, and sex. However, since the number of patients sampled was insufficient and the average size of the lesions in the female patients was smaller, the size of the lesion seems to be the most important factor.     

Short-term effects of intravitreal bevacizumab for subfoveal choroidal neovascularization in pathologic myopia

PURPOSE: To determine short-term effects of intravitreal bevacizumab for subfoveal choroidal neovascularization (CNV) in pathologic myopia. METHODS: In this prospective interventional case series, patients were treated with 2.5 mg of intravitreal bevacizumab and followed for 3 months. Best-corrected visual acuity (BCVA), optical coherence tomography (OCT), and fluorescein angiography (FA) were recorded. Indications for retreatment were active leaking CNV shown by FA and presence of subretinal fluid by OCT in combination with visual disturbances. RESULTS: Fourteen patients were included, with a mean age of 53.86 +/- 16.26 years (range 29-85). Mean spherical equivalent was -13.87 +/- 3.68 diopters (-7.25 to -20.50). Minimum follow-up was 3 months. There were no adverse events. The mean initial visual acuity was 20/200 improving to 20/100 at 2 weeks, 20/80 at 4 weeks, and 20/60 at 8 and 12 weeks (P=0.007; P=0.001; P=0.005; P=0.001, respectively). Initial foveal thickness improved from 385.43 microm +/- 125.83 microm to 257.64 +/- 76.6 microm and 194.54 +/- 54.35 microm after the first and third month, respectively (P=0.001). CONCLUSIONS: Initial treatment results of patients with CNV due to pathologic myopia did not reveal any short-term safety concerns. Intravitreal bevacizumab resulted in a significant decrease in foveal thickness and improvement in visual acuity. These favorable initial results support further larger and long-term studies.     

光动力疗法对病理性近视合并脉络膜新生血管患者的疗效观察

目的 观察光动力疗法（PDT）对病理性近视合并脉络膜新生血管（CNV）患者的疗效和安全性。方法回顾性分析2003年6月至2006年4月行PDT治疗的27例（32只眼）病理性近视合并CNV患者的临床资料,比较患者治疗前后视力、荧光素眼底血管造影（FFA）及相干光断层扫描（OCT）图像变化。结果27例患者的年龄为18～59岁,平均40岁;单眼CNV22例,双眼CNV5例;黄斑中心凹下CNV29只眼,旁中心凹CNV3只眼;近视度数为-6D～-12D,随访时间6个月至3年。末次随访时,视力提高两行以上者4只眼（12．5％）,保持稳定者27只眼（84．4％）,下降2行以上者1只眼（3．1％）;视物变形消失者29只眼（90．6％）。FFA检测显示伴有漆纹样裂纹者12只眼,CNV完全闭合者17只眼,部分闭合者9只眼,未闭合者6只眼。27例患者PDT治疗的平均次数为1．3次。结论PDT治疗病理性近视患者的CNV疗效满意,安全性较高,能显著降低中度和重度近视患者的视力下降,且症状明显减轻,可提高病理性近视患者的视觉生活质量。（中华跟科杂志,2007,43：638-641）     

Photodynamic therapy with verteporfin for subfoveal choroidal neovascularization secondary to pathologic myopia: long-term study

PURPOSE: To assess the safety and effectiveness of photodynamic therapy (PDT) with verteporfin for subfoveal choroidal neovascularization (CNV) secondary to pathologic myopia (PM). METHODS: Sixty-two patients (62 eyes) with PM underwent PDT according to the guidelines of the Verteporfin in Photodynamic Therapy Study. Clinical evaluations performed at all study visits included measurement of best-corrected Snellen visual acuity, slit-lamp biomicroscopy, and fundus fluorescein angiography. Patients were followed up at 1 month and 3 months after treatment and thereafter at 3-month intervals. RESULTS: The final visual acuity of the study patients, after a median follow-up of 31 months, improved by >or=1 Snellen lines in 8 patients (13%), deteriorated in 20 (32%), and remained stable in 34 (55%). The baseline visual acuity was similar in the various study groups. The final mean visual acuity in group A (55 years of age or younger) was 20/80 and significantly (P=0.006) better than that (20/138) in group B (older than 55 years of age). The mean final visual acuity in eyes with higher refractive error at baseline (greater than -17 diopters) was significantly better (P=0.014) than that in eyes with lower refractive error (-6 to -10 diopters). CNV size did not affect visual outcomes. CONCLUSION: PDT preserves vision in patients with CNV associated with PM. Younger patients and eyes with higher refractive error appear more likely to benefit from PDT with verteporfin.     

Retinal pigment epithelial marginal retraction after photodynamic therapy for choroidal neovascularization in pathologic myopia

PURPOSE: To report the incidence of retinal pigment epithelial (RPE) marginal retraction after verteporfin photodynamic therapy (PDT) for subfoveal choroidal neovascularization (CNV) in pathologic myopia (PM). METHODS: Retrospective review of 236 patients treated with PDT for subfoveal CNV due to PM. RESULTS: RPE marginal retraction was found in 3 eyes (1.3%), and a decrease of a mean of five lines of vision was reported to occur 10-15 days after treatment. At the end of followup two eyes lost three lines and one six lines from baseline. CONCLUSIONS: RPE marginal retraction as an early complication of PDT for subfoveal CNV secondary to PM is rare. The low incidence of this adverse event, however, should not preclude recommendations for PDT in myopic eyes that could benefit from this treatment modality.     

Photodynamic therapy of subfoveal recurrences after laser photocoagulation of extrafoveal choroidal neovascularization in pathologic myopia

Background Photodynamic therapy with verteporfin (Visudyne; Novartis, Bülach, Switzerland) has been proposed for the treatment of subfoveal choroidal neovascularization secondary to pathologic myopia. We retrospectively evaluated the effects of verteporfin therapy of subfoveal recurrences of extrafoveal myopic CNV previously treated with thermal laser photocoagulation.Methods Twelve eyes, previously treated with thermal laser photocoagulation for extrafoveal choroidal neovascularization, received photodynamic therapy with verteporfin for subfoveal recurrence of choroidal new vessels. Thirteen eyes that did not receive photodynamic therapy served as control group. Vision and fluorescein angiography outcomes were analyzed on all study visits (every 3 months) through month 12. Visual acuity was measured in Snellen lines.Results On average, at the month 12 examination the verteporfin-treated group had gained 2 lines and the untreated group had lost 1 line of vision. Eleven eyes of the verteporfin-treated group compared with nine eyes of the untreated group lost fewer than 3 lines of vision, including four eyes versus none improving at least 1 line of vision.Conclusion Photodynamic therapy with verteporfin might increase the chance of stabilizing or improving vision in patients with subfoveal recurrences of extrafoveal myopic CNV previously treated with thermal laser photocoagulation. A prospective, randomized study on larger series of patients is mandatory.Presented in part at the XXIII Club Jules Gonin Meeting, Montreux, Switzerland, 31 August–4 September 2002     

Preoperative factors influencing visual outcome following surgical excision of subfoveal choroidal

PURPOSE: To evaluate long-term visual acuity outcomes and the influences of various preoperative factors on visual outcome in patients undergoing surgical removal of choroidal neovascular neovascularization (CNV) caused by age-related macular degeneration (ARMD). METHODS: The authors studied 146 eyes of 146 patients who were followed for at least 1 year after surgical excision of CNV associated with ARMD. Surgical indications included subfoveal active CNV localized mainly above the retinal pigment epithelium (RPE) and a standard Japanese decimal visual acuity of 0.3 or worse. CNV above the RPE was diagnosed by fluorescein angiography, indocyanine green angiography, and optical coherence tomography. CNVs were divided into completely classic CNV or mainly classic CNV. The relationships of the post-operative logarithm of the minimum angle of resolution (logMAR) visual acuity with preoperative logMAR visual acuity, the shortest distance from the center of the foveal avascular zone to the CNV margin, CNV size, and age were analyzed. RESULTS: Final logMAR visual acuity was improved (defined as a logMAR visual acuity increase of 0.2 or more) in 78 eyes (54%), stable in 47 (32%), and worsened in 21 (14%). Stepwise regression identified CNV size as a significant factor influencing final logMAR visual acuity (R2 = 0.213, p<0.0001), while preoperative logMAR visual acuity, shortest distance from the center of the foveal avascular zone to the CNV margin, and age showed no significant correlation with final logMAR visual acuity. Surgical complications included retinal detachment in six eyes (4%), subretinal hematoma in four eyes (2%), macular hole in three (2%), and proliferative vitreoretinopathy in two (1%). CNV recurred postoperatively in 18 eyes (12%). In 92 eyes with completely classic CNV, visual acuity was improved in 57 (62%), stable in 27 (29%), and worsened in 8 (9%). In 54 eyes with mainly classic CNV, visual acuity was improved in 21(39%), stable in 20 (37%), and worsened in 13 (24%). CONCLUSIONS: Surgical excision of CNV for ARMD was effective for completely classic CNV, and better postoperative visual acuity was achieved in cases of small CNV. Given the fact that photodynamic therapy (PDT) has only been used in Japan since 2004, future study should compare PDT and surgical excision in Japanese subjects for relative merits against surgical risk and postoperative complications, to define indications for PDT and surgical excision.     

PDT联合玻璃体腔注射Avastin治疗病理性近视CNV

目的：观察光动力疗法（photodynamic therapy, PDT）联合玻璃体腔注射Avastin治疗并发脉络膜新生血管(choroidal neovascularization, CNV)的病理性近视（pathologic myopia, PM）的安全性和临床疗效。 方法：并发黄斑中心凹下CNV的PM 患者17例17眼纳入治疗。PDT按照国际标准进行。3d后在表面麻醉下给予1.5mg Avastin玻璃体腔注射。治疗后第1,3,6,12mo各随访1 次, 随访时间为6~16mo。复查视力、眼压、眼底检查、眼底彩照、FFA、OCT。治疗前、后对比行配对样本t检验统计分析,P<0.05为差异有统计学意义。 结果：末次随访时,视力提高2行以上者4眼（23.53%）,视力提高1行者5眼（29.41%）,视力不变者8眼(47.06%),无视力下降者。术前BCVA：0.02～0.3（logMAR值:平均1.007±0.103）,术后BCVA：0.02～0.5（logMAR值:平均0.873±0.100）（P＜0.01）。术前平均眼压为15.26±0.76mmHg,术后平均眼压为14.97±0.69mmHg（P＞0.05）。FFA检查显示:10眼CNV 完全闭合,占58.82%,其余7眼CNV大部分闭合,占41.18%。CMT：术前平均为: 194.67±12.74μm,术后平均为：132.07±8.32μm,差别有统计学意义（P＜0.01）。 结论：PDT联合玻璃体腔注射Avastin治疗并发CNV的PM安全有效,使CNV渗漏停止或减轻,视网膜水肿消退或减轻,但不同年龄的患者视力预后差别大,老年患者视力预后差,可能与其本身的进行性脉络膜视网膜萎缩有关。但尚需进一步大样本的临床随机对照研究来证实。     

病理性近视脉络膜新生血管抗VEGF治疗期间黄斑中心凹下的脉络膜厚度变化

目的：观察高度近视脉络膜新生血管抗VEGF治疗期间的黄斑中心凹下的脉络膜厚度( subfoveal choroidal thickness, SFCT)变化,确定临床与视力预后相关的脉络膜参数。
　　方法：前瞻性、开放性研究。临床确诊病理性近视脉络膜新生血管患者50例50眼纳入研究。采用国际标准视力表、糖尿病视网膜病变早期治疗研究( ETDRS )视力表测量矫正视力,同时行眼压、检眼镜、眼底照相、荧光素眼底血管造影( FFA)、光学相干断层扫描( OCT)及三面镜作相应检查。治疗前患眼EDTRS视力表视力0~69个字母,平均视力29.69±13.46个字母。所有患眼行玻璃体腔注射雷珠单抗0.05lL,每月随访,观察抗VEGF治疗期间的黄斑中心凹下的脉络膜厚度变化、确定与视功能相关的脉络膜参数。
　　结果：所有患者平均玻璃体腔注射2.47±2.23次。末次随访时平均矫正视力较治疗前提高13.62±8.98个字母,差异有统计学意义(t=6.69,P<0.05);治疗前、治疗后1、6、12lo,患眼平均SFCT分别为81.48±61.62、79.63±60.98、77.92±61.26、78.34±59.48μl,较治疗前分别降低了2.09±8.93、3.68±7.42、3.16±6.95μl。治疗后1lo平均SFCT与治疗前比较,差异无统计学意义(t=0.95,P>0.05);治疗后6、12 lo平均SFCT与治疗前比较,差异有统计学意义(t=2.34、2.61,P<0.05)。24眼(48%)复发,平均每眼复发1.39±1.23次,SFCT自治疗后1lo的75.7±51.6μl到复发时的84.4±55.9μl (比治疗后1 lo 的厚度增加11.5%),差异有统计学意义( P<0.05)。26眼(52%)无复发眼,治疗后1lo 85.3±52.7μl,6lo 83.6±50.5μl及12lo 84.2±54.2μl ,各时间点SFCT两两比较,差异均无显著的改变(P>0.05)。随访期间未发现治疗相关的全身及眼部严重并发症。
　　结论：玻璃体腔注射ranibizulab治疗病理性近视脉络膜新生血管疗效显著、安全性高;抗VEGF治疗(雷珠单抗注射)使病理性近视脉络膜新生血管患眼 SFCT 下降,而CNV复发时表现为SFCT增厚, SFCT的增厚可能是CNV活动期的评估指标。