Neovascular age-related macular degeneration is also known as wet age-related macular degeneration (wAMD) , which is now one of potentially blinding diseases in elder population worldwide.The application of anti-vascular endothelial growth factor (VEGF) drugs is becoming the first-line therapy for wAMD at present.However, during the long-term follow up, we find that the vision of some patients dose not improve even falls after treatment, or the vision is unable to keep for a long term after its improvement.Hence,to find the key factors that affect the therapeutical effect is the focus issue nowadays.There are many factors that affect wAMD curative effect,including the limitation of drug itself, the personal conditions of the patients, the features of the choriodal neovascularization (CNV) , the formulation and implementation of the treatment regimen, etc.Imaging features of CNV and treatment timing can serve as the available indexs to analyze the prognosis.In addition,reasonable and optimized managing regimens for wAMD probably is an approach to improve the treating effect.Understanding of the factors that affect curative effect of wAMD is benefit for us to setup the individualized therapy and achieve the best vision.Ophthalmologists should fully recognize the importance of wAMD individualized treatment and management.

Diabetic macular edema (DME) is the most common reason for visual impairment in diabetic eye diseases.DME is easy to relapse and the treatment outcome is beyond satisfied.Anti-vascular endothelial growth factor (anti-VEGF) therapy has been proposed to be a first-line or key treatment regimen in the management guideline for DME.However,in clinical practice,there still are many ambiguous and controversial views in the choice and implement of different managing paradigms,including the therapeutical goal,the assessment of treatment effectiveness,the explanation of the guidelines,the regimen of anti-VEGF therapy,the value evaluation of laser photocoagulation,the use of steroids and the management of recurrent DME.Recently,the researches of treating drugs for DME are developing and making a great progress,so eye doctors should track the research results,improve the therapeutical regimen,fully understand the advantages and disadvantages of different treating methods and standardize the treatment process in order to release the best treatment effects on DME.

The therapeutic effect of anti-vascular endothelial growth factor (VEGF) for neovascular age-related macular degeneration (nAMD) was determined by a number of factors.Comprehensive thorough analysis of clinical features,imaging results and treatment response can predict the potential efficacy and possible vision recovery for the patient,and also can optimize the treatment regime to make a personalized therapy plan.Precise medicine with data from genomics,proteomics and metabolomics study will provide more objective and accurate biology basis for individual precise treatment.The future research should focus on comprehensive assessment of factors affecting the efficacy of anti-VEGF therapy,to achieve individualized precise diagnosis and treatment,to improve the therapeutic outcome of nAMD.

Objective This study was designed to establish an experimental Choroidal neovascularization (CNV) model in BN rats, which could exhibit high reproducibility and to evaluate the expression of pigment epithelium-derived factor (PEDF). Methods 30 rats were received krypton laser. 1 days, 3 days, 7 days, 14days, 21 days and 28 days after photocoagulation, fundus fluorescein angiography (FFA) wAS performed. Total RNA were abstracted from retinal and choroidal tissue and the mRNA of PEDF was detected by RT-PCR.Results FFA showed flurescein leakage from 1 week to 4 weeks after photocoagulation. The mRNA of PEDF were in significantly difference during 4 weeks by RT-PCR.Conclusions Kryton laser photocoagulation can be successfully used to produced CNV experimental model in the BN rat. This study gave us a effective way to evaluate the mechanism of CNV by RT-PCR.

Objective To observe the effect of scanning laser ophthalmoscope (SLO) measuring macular light sensibility on evaluating the visual function in idiopathic epiretinal membrane (IERM), and analyze the relationship among the macular light sensibility, central visual acuity, and the thickness of fovea. Methods Procedure of microperimetry of SLO was performed on 44 patients (55 eyes) with IERM diagnosed by indirect and direct ophthalmoscope and optical coherence tomography (OCT). The light sensibility at 10? macular central area was measured. The results were compared with 31 healthy control eyes which underwent the same examinations simutaneously. The correlation among the macular light sensibility, the thickness of fovea measured by OCT, and the results of logarithm visual acuity was anaylzed. Results Compared with the control eyes, macular light sensibility decreased in IERM eyes significantly (F=47.265,P

Objective To evaluate the visual function before and after photodynamic therapy(PDT) in patients with subfoveal choroidal neovascularization (CNV) caused by age-related macular degeneration (AMD). Methods Twenty-five consecutive patients (34 eyes) treated with PDT (verteporfin) for subfoveal CNV in age-related macular degeneration diagnosed by fluorescein angiography (FFA), indocyanine green angiography (ICGA) and optical coherence tomography (OCT). Visual function including best corrected visual acuity, contrast sensitivity frequency, binocular function, confusion, stereo-vision, color vision, metamorphopsis and central scotoma were examed before photodynamic therapy and 1 week, 1 month, 3 month after photodynamic therapy. The follow-up time varied from 3 months to 2 years (mean 7.6 months). Results The changes of visual function at the 3rd month after photodynamic therapy revealed improving in 13 eyes (38.24%), without any change in 17 eyes (50.00%), and decreasing in 6 eyes (17.65%). Visual acuity with logMRA improved after photodynamic therapy, but without statistic difference. All spatial contrast sensitivity improved. Contrast sensitivity for spatial frequencies 5 cycles per degree (cpd) was better after photodynamic therapy with significant difference (P=0.045).Binocular function, fusion function, stereo function and color vision were slightly improved without statistic difference. Conclusion Damage of visual function in macular degeneration is many-sided. The treatment of PDT for exudative AMD can improve part visual function.

Objective To compare the safety and effect of the phacoemulsification (PHACO) versus extracapsular cataract extraction (ECCE) in patients with intumescent senile cataract.Methods 200 eyes from patients with intumescent cataract were included and randomly divided into 2 groups:PE group (108 eyes,received PHACO) and ECCE group (92 eyes,received small incision ECCE) respectively.Superior quadrant sclera tunnel incisions were made with stabs of 2.8 mm diameters.Trypan-blue was used to show the anterior lens capsular membrane.In the PHACO group,a 4 mm diameters continuous curvilinear capsulorhexis (CCC) was made,which was enlarged to 6-7 mm after the intraocular lenses (IOL) implantation.For the ECCE group,a 8 mm-diameter CCC was made.Then the lens nucleus was either phacoemulsificated or delivered and IOL was implanted.The complications during and after surgery and the visual outcomes were recorded and statistically analyzed by SPSS 13.0 software.Results Age,sex and the hardness of the nucleus were comparable between the two groups.The best corrected vision acuity (BCVA) was 0.05 and worse in all patients before surgery.While 3 days after operation,in PE group,105 eyes (97.2％,105/108) gained postoperative vision 0.05 and better,and 82 of them were better than 0.3; in group ECCE,97.2％ (89/92) of the operated eyes gained vision 0.05 and better,72 (78.3％,72/92) eyes were better than 0.3.No statistical differences were found between the two groups in postoperative vision recovery.While,there were more failure rates of the CCC,tear of the anterior and posterior capsular,loss of the vitreous and iris injury rate in the ECCE group than in the PE group (20.7％ vs.8.3％,17.4％ vs.12.0％,7.6％ vs.0.9％,15.2％ vs.0％,P=0.01,P=0.00,P=0.02,P＜ 0.001).Prolapse of iris and discoria were found in ECCE group.Conclusions With small CCC,phacoemulsification can lead to better surgical outcomes than small incision ECCE procedures,and the operative and post-operative complications are less in PE group than in ECCE group.

Objective To establish an experimental choroidal neovascularization(CNV)model in brown norway(BN)rats by laser infusion in order to study the evolution of CNV during 3 weeks with intravitreaI injection of 1 μl(25 μg)bevacizumab,and make a preliminary investigation of the treatment effect of bevacizumab on experimental CNV. Methods Four groups of 48 BN rats were photocoagulated by krypton laser in 1 eye to induce CNV model in 1 eye,in which 4 groups received 1 μl(25 μg)bevacizumab intravitreal injection 1 week after photocoagulation and the other groups received the same volume intravitreall injection of balanced salt solution(BSS)as control.Fundus fluorescein angiography(FFA)examinations were taken on 1,2,3 week and the eyes were enucleated and processed for histopathologic examination.The areas of CNV were measured in the early phase of FFA.FⅧ-Rag protein was investigated with immunohistoehemistry and was semiquantkatively analyzed. Results The area and the leakage of CNV in bevacizumab treated BN rat eyes were obviously reduced as compared with the control group at each interval.In the treatment group,the expression of FⅧ-Rag was depressed.The examination of FⅧ-Rag and FFA verified the depression of CNV as compared with the control group at each interval.The density of treatment was lower than of control group(P＜0.01).After bevacizumab treatment for 2 weeks,the area of CNV and the expression of FⅧ-Rag were decreased[(0.920±0.634)mm2 and 35.57±10.52,respectively),as compared with the control group[(2.489±0.590)mm2 and 175.37±25.20]. Conclusions Intravitreal bevacizumab injection can inhibit the development of CNV.

Objective To investigate the factors associated with vision and hole closure for idiopathic macular hole (IMH) after vitrectomy surgery.Methods Eighty-nine eyes of 89 patients with IMH were enrolled in this retrospective study.There were 15 males and 74 females.The patients aged from 42 to 82 years,with the mean age of (64.13 ± 7.20) years.All subjects underwent best corrected visual acuity (BCVA) and optical coherence tomography (OCT) examinations.The BCVA ranged from 0.01 to 0.4,with the mean BCVA of 0.12 ± 0.09.The MH stages was ranged from 2 to 4,with the mean stages of 3.56 ± 0.77.The basal diameter ranged from 182 μm to 1569 μm,with the mean basal diameter of (782.52± 339.17) μm.The treatment was conventional 25G pars plana vitrectomy combined with phacoemulsification and intraocular implantation.Fortyone eyes received internal limiting membrane peeling and 48 eyes received internal limiting membrane grafting.The follow-up ranged from 28 to 720 days,with the mean follow-up of (153.73 ± 160.95) days.The visual acuity and hole closure were evaluated on the last visit and the possible related factors were analyzed.Results On the last visit,the BCVA ranged from 0.02 to 0.8,with the mean BCVA of 0.26±0.18.Among 89 eyes,vision improved in 45 eyes (50.56％) and stabled in 44 eyes (49.44％).Eighty-six eyes (96.63％) gained MH closure but 3 eyes (3.37％) failed.By analysis,patients of early stages of MH and smaller basal diameter of MH will gain better vision outcome (t=2.092,2.569;P＜ 0.05) and patients of early stage MH will gain high hole closure rate after surgery for IMH (t=-5.413,P＜0.05).However,gender,age,duration,preoperative BCVA,surgery technique,gas types and follow-up time had no relationship with the effect after surgery for IMH (P＞0.05).Conclusions Stages of MH and basal diameter of MH may be the factors associated with the visual outcome for idiopathic macular hole after surgery.However,age,gender,duration,surgery patterns,gas types and followup time showed no effects on operational outcomes.

10.3969/j.issn.1007-3969.2013.04.004