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Objective:To investigate the effect of distilled water on the viability of human lens epithelial cells (LECs) cultured in vitro. Methods:A total of 156 anterior capsule specimens were collected from 156 patients (156 eyes) who were diagnosed with age-related cataract during phacoemulsification combined with intraocular lens implantation from May to December 2020 in Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School.The 156 specimens were divided into 312 small pieces.Of the 312 pieces, 157 pieces were divided into normal control group (23 pieces), positive control group (10 pieces), balanced salt solution (BSS) immersion group (61 pieces) and distilled water immersion group (63 pieces) using computer-generated random numbers.Normal control group received no treatment.Positive control group was directly fixed with a mass fraction of 4% histiocytes fixative solution.For the 61 pieces in BSS immersion group, 20 pieces were soaked for 1 minute, 21 pieces for 2 minutes, and 20 pieces for 3 minutes.For the 63 pieces in distilled water immersion group, 20 pieces were soaked for 1 minute, 23 pieces for 2 minutes, and 20 pieces for 3 minutes.Another 125 pieces were selected to simulate the cataract aspiration-irrigation according to the treatment in BSS immersion group and distilled water immersion group respectively, plus rinse in a bottle containing BSS at a height of 70 cm for 1 minute.Cell viability was detected by trypan blue-eosin staining.LECs density, dead cell count, cell death rate and percentage of shedding (%) were calculated.Of the remaining 30 pieces, every 15 pieces were divided into normal control group, BSS immersion group, and distilled water immersion for 1, 2 and 3 minutes groups, with 3 pieces in each group.BSS immersion group was immersed for 3 minutes, and the other four groups were treated as mentioned above, and the LECs structure of the four groups was observed by light microscopy and transmission electron microscopy.This study adhered to the Declaration of Helsinki.The study protocol was approved by the Ethics Committee of Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School (No.2019-248-01). Written informed consent was obtained from each subject.Results:The boundaries of LECs in BSS treatment groups were clear, and there was no significant difference in morphology compared with normal control group.With time increasing, LECs in distilled water treatment groups gradually swelled, and the boundaries of dead cells were not clear.There were significant differences in LECs density, dead LECs count and LECs mortality ( F=13.459, 98.918, 130.600; all at P<0.001). The LECs density was lower in 2-minute and 3-minute distilled water treatment groups than in normal control group, showing statistically significant differences (both at P<0.05). The dead LECs count and LECs mortality were higher in 1-minute, 2-minute and 3-minute distilled water treatment groups than in normal control group and BSS treatment groups for the same time, and the differences were statistically significant (all at P<0.05). Only a few shed LECs were seen in normal control group, 1-minute, 2-minute and 3-minute BSS treatment groups, and BSS immersion combined rinse group.After different time of soaking, there were more shed LECs in distilled water immersion combined rinse group, and the range of LECs shedding increased with the extension of distilled water immersion.There was a significant difference in the shedding percentage of LECs among different groups ( F=123.670, P<0.001). The shedding percentages of LECs at different time points were higher in distilled water immersion groups and distilled water immersion combined rinse groups than in normal control group, and the difference was statistically significant (all at P<0.05). The shedding percentage of LECs increased significantly in distilled water immersion groups with the extension of immersion.Light microscopy showed that the cells were destroyed in 1-minute, 2-minute and 3-minute distilled water treatment groups, and some LECs shed in the 2-minute and 3-minute treatment groups.Transmission electron microscopy showed cell lysis and destruction, suborganelles swelling, disruption of intercellular junctions in 1-minute, 2-minute and 3-minute distilled water treatment groups, loose attachment between cells and capsule in the 2-minute and 3-minute treatment groups, and cell detachment from capsule in the 3-minute treatment group. Conclusions:Distilled water immersion leads to LECs death in a time-dependent manner, and distilled water immersion combined with rinse can remove LECs on the lens capsule.
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The internal limiting membrane located at vitreoretinal interface is formed by the contiguous basement membranes of Müller cells.Nowadays, vitrectomy combined with internal limiting membrane peeling has been widely used in many operations involving macular area.Although its clinical efficacy and safety have been demonstrated, it lacks the necessary histological support.At the same time, many studies have shown that the internal limiting membrane plays different roles in the occurrence of different diseases.Current studies have found that the proliferation of inflammatory cells, glial cells and vitreous cells leads to the physiological dysfunction of the vitreoretinal interface, and the internal limiting membrane can also become a scaffold for the proliferation of myofibroblasts, which will lead to the occurrence of macular diseases.This article reviewed the histological research of internal limiting membrane in terms of diabetic retinopathy, idiopathic macular hole and idiopathic macular epiretinal membrane, hoping to better understand the internal limiting membrane under pathological conditions and to confirm the safety and necessity of internal limiting membrane peeling from ultrastructure.
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Objective:To compare the one-year postoperative visual quality after trifocal intraocular lens (IOL) implantation and monofocal IOL implantation.Methods:A cohort study was conducted.Forty-one eyes from 41 age-related cataract patients who underwent phacoemulsification extraction combined with IOL implantation in Nanjing Drum Tower Hospital from May 2017 to June 2018 were enrolled.The patients were divided into trifocal IOL group (20 eyes) receiving ZEISS AT LISA tri 839MP trifocal IOL implantation and monofocal IOL group (21 eyes) receiving ZEISS 603P monofocal IOL implantation according to their willingness.One year after surgery, uncorrected distant visual acuity (UCDVA), uncorrected intermediate visual acuity (UCIVA), uncorrected near visual acuity (UCNVA), best corrected distance visual acuity (BCDVA), distance corrected intermediate visual acuity (DCIVA) and distance corrected near visual acuity (DCNVA) were detected in both groups.The patient point spread function (PSF), modulation transfer function (MTF) cutoff frequency, Strehl ratio (SR), OQAS Ⅱ values at 100%, 20%, and 9% contrast (OV 100%, OV 20%, OV 9%) and objective scattering index (OSI) were measured by OQAS Ⅱ.Wavefront aberrations including total aberration (TA), total high order aberrations (tHOAs), spherical aberration, coma, trefoil aberration, total low order aberrations (tLOAs), defocus, and astigmatism were evaluated with the iTrace visual function analyzer.All aberrations were represented by root mean square.The visual acuity of operative eyes was measured with a phoropter, and defocus curves were drawn with visual acuity better than 0.5 LogMAR.The incidence of posterior capsular opacification (PCO) in the IOL region was quantitatively analyzed by Sellman method.Visual function was scored by visual function index (VF-14). This study adhered to the Declaration of Helsinki.The study protocol was approved by an Ethics Committee of Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School (No.2018-219-01). Written informed consent was obtained from each subject prior to any medical examination.Results:One year after the operation, UCIVA, UCNVA, DCIVA, and DCNVA of trifocal IOL group were significantly better than those of monofocal IOL group, and the differences were statistically significant (all at P<0.001). OQAS Ⅱ visual quality indicators showed that the MTF cutoff frequency, SR, OV 100%, and OSI values of trifocal IOL group were significantly higher than those of monofocal IOL group, showing statistically significant differences (all at P<0.001). No significant difference in wavefront aberrations was found between the two groups (all at P>0.05). Defocus curve showed that the LogMAR visual acuity of patients at -1.0 D, -1.5 D, -2.0 D, -2.5 D, -3.0 D, and -3.5 D (namely, 1 m, 66 cm, 50 cm, 40 cm, 33 cm, and 29 cm) in monofocal IOL group were significantly better than those in trifocal IOL group (all at P<0.05). There was a higher incidence of PCO in trifocal IOL group than monofocal IOL group, with a statistically significant difference ( χ 2=41.0, P<0.001). The VF-14 score of trifocal IOL group was 87.99±1.09, which was significantly higher than 81.49±1.67 of monofocal IOL group ( t=10.301, P<0.001). Conclusions:One year after trifocal IOL implantation, the full range of vision, subjective and objective visual quality of eyes are better than eyes implanted with monofocal IOL.
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Objective:To investigate and evaluate the safety of intravitreal injection of recombinant human endostatin (rh-endostatin) with different concentrations in rabbit eyes.Methods:Thirty healthy adult New Zealand white rabbits were enrolled with the right eyes selected as experimental eyes, and were randomly divided into five groups by random distribution of computer numbers, with 6 eyes in each group.The rabbits in the normal control group were given no treatment, and the rabbits in the normal saline group, 0.125 mg rh-endostatin group, 0.250 mg rh-endostatin group and 0.500 mg rh-endostatin group were treated with 100 μl of normal saline, 0.125 mg/100 μl, 0.250 mg/100 μl and 0.500 mg/100 μl rh-endostatin according to grouping, respectively.The anterior segment and fundus of the experimental eyes were examined using slit lamp biomicroscope and indirect ophthalmoscope, and the intraocular pressure (IOP) of the experimental eyes were measured with iCARE handheld tonometer before injection and 1 day, 3, 7, 14, 30 and 60 days after injection.Optical coherence tomography (OCT) examination was performed before the intravitreal injection and 7, 30, and 60 days after injection, respectively.Flash electroretinogram was performed before intravitreal injection and 14 days and 60 days after injection.The rabbits were sacrificed by euthanasia at 60th day after injection.Three experimental eyes of each group were dissected and made into paraffin section, and histopathological staining was used to detect the retinal structural changes.The retinal tissue was separated from the other three study eyes in each group, and the transmission electron microscope was employed to observe the ultrastructural changes of the retina.All animal experiments were performed in adherence to the Regulations of the State and the Animal Center of Yangzhou University Medical College for the Use of Animals in Research.Results:After intravitreal injection, no obvious anterior or posterior chamber change was observed by slit lamp microscopy in all groups at any time point.Flocculent seepage was observed in one eye of the 0.125 mg and 0.500 mg rh-endostatin group, respectively, which was then absorbed completely on the 7th and 14th day.OCT examination showed no abnormal light reflection or morphological changes in fundus of day after injection in all the groups.There was no significant difference in IOP, a-wave and b-wave amplitude among all the groups at different time points ( Fgroup=0.134, 0.101, 0.476; Ftime=1.709, 2.479, 1.706; all at P>0.05). Neither light nor electron microscopy showed any retinal damage in any group. Conclusions:Intravitreal injection of rh-endostatin is safe at the dosage of 0.125-0.500 mg in rabbits.
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Objective:To observe the effect of recombinant human vascular endostatin(ES) on retinal barrier related proteins in early streptozotocin (STZ)-induced diabetic rats.Methods:Diabetes rat model was induced by STZ.Two weeks after the model was successfully constructed, 36 diabetic model rats were randomly divided into the model group, 1.0 μl ES group, 2.5 μl ES group, 5.0 μl ES group, 2.5 μl bevacizumab group, and the combination therapy group, with 6 rats in each group.Different doses of recombinant human ES and 2.5 μl bevacizumab were injected into the vitreous cavity of the right eye according to the grouping.Six normal rats were selected as the blank control group.At 4 weeks after intravitreal injection, the retinal tissue of the right eye in each group was collected, and the expression levels of inter cellular cell adhesion molecule-1(ICAM-1), vascular cell adhesion molecule-1(VCAM-1), occludin, claudin-5, vascular endothelial growth factor(VEGF) and other proteins in retinal tissue were detected by Western blot assay.The use and care of animals was in accordance with the regulations for the administration of experimental animals.Results:The diabetic model rats showed polydipsia, polyuria, polyphagia and other typical diabetic symptoms, the body quality decreased significantly, and the success rate of modeling was 100%.Western blot results showed that the expression levels of VCAM-1, ICAM-1 and VEGF in the blank group, the 2.5 μl ES group, the 5.0 μl ES group, the bevacizumab group, the combination therapy group were significantly lower than those in the model group, while the expression levels of claudin-5 and occludin were significantly higher than those in the model group, the differences were statistically significant (all at P<0.05). The relative expression of occludin protein in the 1.0 μl ES group was significantly higher than that in the model group(0.23±0.02 vs.0.13±0.02), while the relative expression of ICAM-1 and VEGF was significantly lower than that in the model group(0.53±0.01 vs.0.81±0.01; 0.57±0.00 vs.0.86±0.00), the differences were statistically significant (all at P<0.05). As the dose of ES increased, the relative expressions of claudin-5 and occludin protein tended to increase, while the relative expressions of VCAM-1, ICAM-1 and VEGF tended to decrease. Conclusions:Recombinant human vascular endostatin can directly or indirectly reduce the release of inflammatory factors VCAM-1 and ICAM-1 and inhibit the expression of VEGF, thereby reduce the loss of retinal tight junction.
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Objective@#To observe the outcomes of 23G pars plana vitrectomy (PPV) and air tamponade for non-inferior rhegmatognous retinal detachment (RRD).@*Methods@#A prospective case series study. From August 2017 to April 2018, 39 consecutive RRD patients (39 eyes) in Department of Ophthalmology of Subei People’s Hospital Affiliated to Yangzhou University were enrolled in this study. There were 20 males(20 eyes) and 19 females (19 eyes), 23 right eyes and 16 left eyes, with the mean age of 55±11 years. There were 30 eyes with lens and 9 eyes without lens or IOL. There were 21, 14 and 4 eyes with 1, 2 and equal or greater than 3 retinal tear respectively. All patients underwent 23G PPV which performed preretinal proliferative membranes and vitreous cortex removal, photocoagulation around the breaks with 3-5 rows, and filtered air tamponade. The follow-up was more than 2 months. The retinal reattachment, visual acuity and complications were observed. Pearson correlation analysis was used to analyze the correlation between BCVA and disease course. Chi-square test was performed for comparison among retinal reattachment rate and different clinical factors before operation.@*Results@#At 2 months after the PPV, 35 eyes' retina reattached, the rate of reattachment was 89.8%. In 2-3 weeks, 4 eyes were re-detached, all of them performed silicone oil tamponade. One eye was secondary to pre-macular membrane. The logMAR BCVA before and after PPV were 1.15±0.78 and 0.41±0.31, respectively (t=6.589, P=0.0001). Correlation analysis results showed that BCVA after surgery was positively correlated with BCVA before surgery(r=0.544, P=0.001). Twelve of 30 eyes with crystalline lens suffered cataract. The rate of reattachment vary in the number of the breaks (χ2=9.181, P=0.010).@*Conclusion@#PPV with air tamponade may be an optimal treatment of non-inferior RRD with better success rate and security.
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Objective@#To investigate the lens and ora serrata safety during 23G vitrectomy with sclera incisions at 5.0 mm or 4.0 mm posterior to the limbus.@*Methods@#A prospective case-controlled study was adopted. From April 2016 to January 2018, 290 consecutive primary 23G vitrectomy patients (300 eyes) with vitreoretinal disease in Department of Ophthalmology of Subei People’s Hospital Affiliated to Yangzhou University were enrolled in this study. Among them, 146 patients (150 eyes) received 23G pars plana vitrectomy (PPV) with scleral incisions at 5.0 mm posterior to the limbus (5.0 mm group), and 144 patients(150 eyes) at 4.0 mm (4.0 mm group). No statistically significant difference was found in age, axial length(t=−1.324, 0.867; P=0.186, 0.387) and in gender, right/left eyes, proportion of indications (χ2=1.366, 2.615, 10.195; P=0.242, 0.106, 0.070) between the two groups. The incidence rate of complications between the two groups were comparatively observed, such as lens injury, retinal tears close to the scleral incision, retinal hemorrhage, supra-choroidal expulsive hemorrhage and iatrogenic retinal detachment. Independent sample t test and χ2 test were performed for comparison between the two groups.@*Results@#Lens injury was observed in 4 eyes(2.67%) and 14 eyes (9.33%) respectively in the 5.0 mm and 4.0 mm group during surgery (χ2=5.910, P=0.015). Retinal tears close to the scleral incision sites were observed in 5 eyes (3.33%) and 6 eyes (4.00%) respectively in the 5.0 mm and 4.0 mm group during surgery (χ2=0.094, P=0.759). The mean time of removing the vitreous base was 6.17±2.76 min and 10.03±5.56 min respectively in the 5.0 mm and 4.0 mm group (t=7.599, P <0.01). No other surgical complications occurred in any group, such as retinal hemorrhage, supra-choroidal expulsive hemorrhage and iatrogenic retinal detachment, etc.@*Conclusion@#In primary 23G PPV, the safety of ora serrata with incisions at 5.0 mm posterior to limbus is similar to that at 4.0 mm, but the safety of lens and the efficiency of vitreous resection is higher with incisions at 5.0 mm.
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Objective@#To reveal the pathogenic mutations in Chinese families with idiopathic congenital nystagmus(ICN)@*Methods@#Six families with ICN were recruited from Subei People's Hospital.DNA was extracted from peripheral blood samples of all participants.All coding and exon-intronic boundary regions of the targeted gene FRMD7 were amplified with PCR and sequenced using Sanger sequencing to detect potential pathogenic mutations.This study followed the Helsinki Declaration and was approved by the Ethics Committee of Subei People's Hospital (NO.2015KY-126). All patients or their guardians signed informed consent.@*Results@#Three mutations (c.902A>G, c.1944T>A and 1945G>T) were screened in two families after co-segregation validation of intrafamilial genotype-phenotype, c.1944T>A and 1945G>T were newly detected mutations which were not detected in 100 normal controls.No significant mutations were found in the FRMD7 coding region and adjacent splicing sites in the probands of the other four families.@*Conclusions@#Two novel pathogenic mutations of FRMD7 are discovered, which expands the pathogenic mutational spectrum of FRMD7 gene causing ICN.
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Objective To observe the outcomes of 23G pars plana vitrectomy (PPV) and air tamponade for non-inferior rhegmatognous retinal detachment (RRD).Methods A prospective case series study.From August 2017 to April 2018,39 consecutive RRD patients (39 eyes) in Department of Ophthalmology of Subei People's Hospital Affiliated to Yangzhou University were enrolled in this study.There were 20 males (20 eyes) and 19 females (19 eyes),23 right eyes and 16 left eyes,with the mean age of 55 ± 11 years.There were 30 eyes with lens and 9 eyes without lens or IOL.There were 21,14 and 4 eyes with 1,2 and equal or greater than 3 retinal tear respectively.All patients underwent 23G PPV which performed preretinal proliferative membranes and vitreous cortex removal,photocoagulation around the breaks with 3-5 rows,and filtered air tamponade.The follow-up was more than 2 months.The retinal reattachment,visual acuity and complications were observed.Pearson correlation analysis was used to analyze the correlation between BCVA and disease course.Chi-square test was performed for comparison among retinal reattachment rate and different clinical factors before operation.Results At 2 months after the PPV,35 eyes' retina reattached,the rate of reattachment was 89.8％.In 2-3 weeks,4 eyes were re-detached,all of them performed silicone oil tamponade.One eye was secondary to pre-macular membrane.The logMAR BCVA before and after PPV were 1.15 ± 0.78 and 0.41 ± 0.31,respectively (t=6.589,P=0.0001).Correlation analysis results showed that BCVA after surgery was positively correlated with BCVA before surgery (r=0.544,P=0.001).Twelve of 30 eyes with crystalline lens suffered cataract.The rate of reattachment vary in the number of the breaks (x2=9.181,P=0.010).Conclusion PPV with air tamponade may be an optimal treatment of non-inferior RRD with better success rate and security.
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Objective To investigate the lens and ora serrata safety during 23G vitrectomy with sclera incisions at 5.0 mm or 4.0 mm posterior to the limbus.Methods A prospective case-controlled study was adopted.From April 2016 to January 2018,290 consecutive primary 23G vitrectomy patients (300 eyes) with vitreoretinal disease in Department of Ophthalmology of Subei People's Hospital Affiliated to Yangzhou University were enrolled in this study.Among them,146 patients (150 eyes) received 23G pars plana vitrectomy (PPV) with seleral incisions at 5.0 mm posterior to the limbus (5.0 mm group),and 144 patients (150 eyes) at 4.0 mm (4.0 mm group).No statistically significant difference was found in age,axial length(t=-1.324,0.867;P=0.186,0.387) and in gender,right/left eyes,proportion of indications (x2=1.366,2.615,10.195;P=0.242,0.106,0.070) between the two groups.The incidence rate of complications between the two groups were comparatively observed,such as lens injury,retinal tears close to the scleral incision,retinal hemorrhage,supra-choroidal expulsive hemorrhage and iatrogenic retinal detachment.Independent sample t test and x2 test were performed for comparison between the two groups.Results Lens injury was observed in 4 eyes (2.67％) and 14 eyes (9.33％) respectively in the 5.0 mm and 4.0 mm group during surgery (x2=5.910,P=0.015).Retinal tears close to the scleral incision sites were observed in 5 eyes (3.33％) and 6 eyes (4.00％) respectively in the 5.0 mm and 4.0 mm group during surgery (2x2=0.094,P=0.759).The mean time of removing the vitreous base was 6.17 ± 2.76 min and 10.03 ± 5.56 min respectively in the 5.0 mm and 4.0 mm group (t=7.599,P＜0.01).No other surgical complications occurred in any group,such as retinal hemorrhage,supra-choroidal expulsive hemorrhage and iatrogenic retinal detachment,etc.Conclusion In primary 23G PPV,the safety ofora serrata with incisions at 5.0 mm posterior to limbus is similar to that at 4.0 mm,but the safety of lens and the efficiency of vitreous resection is higher with incisions at 5.0 rnm.
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Idiopathic macular hole (IMH) refers to full thickness defects of retinal neuroepithelial layer in macular area without clear reasons,and the combination of pars plana vitrectomy (PPV) with internal limiting membrane peeling (ILMP) is a standard procedure for macular hole.This technique can improve anatomical success and reduce the tangential forces,and thus accelerating the macular hole closure.With increasing use of ILMP and vital dye,the controversial issue of the intentional ILMP has arisen.First,the earliest change in the macula after ILMP is postoperative swelling of the arcuate retinal nerve fiber layer and dissociated optic nerve fiber layer occurs later in the postoperative period;second,retinal thickness modification,such as the thinning of retinal nerve fiber layer (RNFL),ganglial cell layer (GCL) and inner plexiform layer (IPL);third,displacement of foveal area toward optic disc and decrease of the foveal avascular zone area decrease retinal sensitivity and changes of the focal macular electroretinogram.This article reviewed the effects of ILMP during macular hole surgery on retinal anatomical and functional outcomes.
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Objective To reveal the pathogenic mutations in Chinese families with idiopathic congenital nystagmus(ICN) Methods Six families with ICN were recruited from Subei People's Hospital. DNA was extracted from peripheral blood samples of all participants. All coding and exon-intronic boundary regions of the targeted gene FRMD7 were amplified with PCR and sequenced using Sanger sequencing to detect potential pathogenic mutations. This study followed the Helsinki Declaration and was approved by the Ethics Committee of Subei People's Hospital (NO. 2015KY-126). All patients or their guardians signed informed consent. Results Three mutations (c. 902A>G, c. 1944T>A and 1945G>T) were screened in two families after co-segregation validation of intrafamilial genotype-phenotype,c. 1944T>A and 1945G>T were newly detected mutations which were not detected in 100 normal controls. No significant mutations were found in the FRMD7 coding region and adjacent splicing sites in the probands of the other four families. Conclusions Two novel pathogenic mutations of FRMD7 are discovered,which expands the pathogenic mutational spectrum of FRMD7 gene causing ICN.
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Objective To evaluate the safety to perform 23G vitrectomy with scleral incisions at 5.0 mm behind the limbus.Methods This is a prospective uncontrolled case study.The data of 140 consecutive primary 23G vitrectomy patients (145 eyes) were enrolled in this study.There were 56 males (59 eyes) and 84 females (86 eyes),with the mean age of (56.34 ± 9.98) years and axial length of (23.99± 2.57) mm.There were 139 phakic eye and 6 aphakic eyes.All the eyes received 23G pars plana vitrectomy with scleral incisions at 5.0 mm behind the limbus.To measure the normal Chinese adult parameters of anteroposterior axis of the eyeball,lens thickness and scleral distances from the limbus to the plane passing through the lens posterior apex,the head CT scans of 105 patients without eye diseases in our hospital were studied during the same period of time for these vitrectomy surgeries.Pearson correlation analysis was used to analyze the relationship between age,anteroposterior axis of eyeball,lens thickness and scleral distances from the limbus to the plane passing through the lens posterior apex.Results Surgical related complications included retinal tears close to the scleral incision sites (3/145 eyes,2.1％) and lens injury (3/121 eyes,2.5％).No other surgical complications occurred,such as retinal hemorrhage,supra-choroidal expulsive hemorrhage and iatrogenic retinal detachment.Based on CT images,the average scleral distance from limbus to the plane passing through the lens posterior apex,anteroposterior axis of eyeball and lens thickness was (6.72± 0.81),(24.39± 0.97),(4.22 ± 0.47) mm,respectively.The results of Pearson correlation analysis showed that age and lens thickness had statistically significant correlation (r=0.328 9,P=0.000 6).Conclusion Primary 23G pars plana vitrectomy with incisions at 5.0 mm posterior to the limbus is safe.
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Background Pars plana vitrectomy (PPV) is a main method of treating severe proliferative diabetic retinopathy (PDR) , but intraoperative bleeding often occurs, which affects the intraoperative process and final prognosis.Intravitreal injection of ranibizumab (IVR), a vascular endothelial growth factor (VEGF) monoclonal antibody,has been used in PPV,so the evaluation of therapeutic effect and safety of PPV associated by IVR is very important.Objective This study was to evaluate the effect of IVR-assisted 23G PPV on patients with severe PDR.Methods The clinical data of 82 eyes of 77 patients with severe PDR who received 23G PPV from August 2012 to December 2013 were respectively analyzed,including 49 eyes undergone IV R-assisted 23G PPV (IVR combined with PPV group) and 33 eyes undergone 23G PPV only (simple PPV group).IVR (0.5 mg/0.05 ml) was performed on the eyes 5-7 days before PPV in the IVR combined with PPV group,and only PPV was carried out in the simple PPV group.Operative duration, endodiathermy times, incidence of iatrogenic retinal holes, best corrected visual acuity (BCVA) (LogMAR), postoperative bleeding, re-operation rate, Ⅰ phase attached rate of retinas, occurrence rate of neovascular glaucoma and temporary ocular hypertension rate were compared between the two groups.Results The average operation duration was (71.90-± 26.42) minutes in the IVR combined with PPV group, which was significantly shorter than (96.76±25.15) minutes in the simple PPV group (t =-4.300, P＜0.05).Endodiathermy time in the IVR combined with PPV group was significantly less than that in the simple PPV group (0.76±0.14 versus 2.18±1.64) (x2 =-4.284,P＜0.01).The BCVA at postoperative 3 months was (0.70±0.50) and (0.74±0.50) in the IVR combined with PPV group and simple PPV group,which was significantly improved in comparison with before operation (1.73±0.50,1.70±0.470) respectively (t=-0.151,0.118,both at P＜0.01),but no significant difference in the postoperative BCVA between the two groups (t =-0.318, P =0.758).The incidence of iatrogenic retinal holes was significantly lower in the IVR combined with PPV group than that in the simple PPV group (6.12％ versus 21.20％) (x2 =4.193 ,P=0.041).In addition,the postoperative bleeding rate was also significantly different between the IVR combined with PPV group and the simple PPV group (2.04％ versus 15.15％) (x2=6.580, P=0.010).No significant differences were seen in the incidence of re-operation rate, I phase attached rate of retinas,occurrence rate of neovascular glaucoma and temporary ocular hypertension rate between two groups (all at P＞O.05).Conclusions IVR before 23G PPV can reduce the risk of intravitreal bleeding during operation and after surgery,shorten operation duration and lessen the incidence of iatrogenic retinal break.The BCVA after IVR-assisted PPV improves as good as simple PPV.
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Background In patients with syphilis,one of the common manifestations is uveitis.However,the lack of understanding on syphilic posterior uveitis may result in misdiagnosis and delayed treatment.Objective This study was to assess ocular clinical features,treatment and prognosis in patients who had latent syphilis and presented with posterior uveitis as the initial symptom.Methods A serial cases-observational study was designed.Twelve patients(19 eyes)who were diagnosed as syphilis from September 2011 to January 2013 were retrospectively analyzed.All patients were characterized by initial posterior uveitis before the final diagnosis.The clinical manifestation,management and prognosis were evaluated and analyzed.All patients were informed of this study and consented with the use of their data for this retrospective study.Results The patients presented with initial clinical signs of acute or chronic posterior uveitis and lacked systemic syphilis symptom.Bilateral posterior uveitis were found in 7 patients and unilateral in 5 patients.The dust-like and grey-white opacification in vitreous was seen by threemirror contact lens in all the patients.Mild hyperemia of the optical disc was found in 10 eyes with the unclear peripapillary boundary.Yellow-white lesions were observed in retinas of 7 eyes and retinal punctuate hemorrhage was in 1 eye.Fundus fluorescein angiography demonstrated fluorescine staining or hyperfluorescence of optic disc in all of the 19 eyes,and fluorescein leakage from vein in 18 eyes,retinal pigment epithelium dye pooling in 6 eyes and cystoid macular edema in 11 eyes.Rapid plasma reagin (RPR) test and treponema pallidum hemagglutination assay (TPHA) were performed and presented positive results in all patients.The visual acuity improved in 19 eyes and partly elevated in 2 eyes following a standard therapy for neurosyphilis was used,including penicillin and/or small doses of glucocorticoid.Conclusions The serological examination for syphilis should be considered for patients with unexplained uveitis.Early diagnosis and prompt treatment are important for the improvement of prognosis in syphilitic posterior uveitis.
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Objective To study the effect and safety of posterior Tenon subtenon triamcinolone acetonide (TA) injection as treatment for diffuse diabetic macular edema.Methods Forty-two patients (54 eyes) with diffuse diabetic macular edema were diagnosed by fundus fluorescence angiography and optical coherence tomography,posterior Tenon subtenon injection of TA 20 mg for treatment.All eyes were examined before treatment and the different time points after treatment by testing visual acuity,intraocular pressure,thickness of macular fovea.Results Preoperative visual acuity was 0.26 ± 0.15,postoperative was 0.29 ± 0.13,0.34 ± 0.14,0.43 ± 0.16,0.41 ± 0.13,0.38 ± 0.17 at 2 weeks,1 month,2 months,3 months and 6 months,respectively,visual acuity improved significantly,there was no significant difference between 2 weeks postoperative and preoperative (P ＞ 0.05),the remaining time points compared with preoperative differences were statistically significant (P ＜ 0.01).Preoperative thickness of macular fovea was (473.9 ±121.8) μ m,postoperative was (462.6 ± 93.3) μ m,(342.8 ± 87.1) μ m,(302.6 ± 67.8) μ m,(321.1 ±79.1) μ m,(355.2 ± 47.6) μ m at 2 weeks,1 month,2 months,3 months and 6 months,respectively,there was no significant difference between 2 weeks postoperative and preoperative (P ＞ 0.05),the remaining time points compared with preoperative differences were statistically significant (P ＜ 0.01).The intraocular pressure at 2 months were significantly higher than preoperative (P ＜ 0.05).No other complications were observed.Conclusion Posterior Tenon subtenon injection of TA as treatment for diffuse diabetic macular edema is safe and effective,which can inject repeatly.
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To observe the protective effects of drug-contained serum of Lingqi Huangban Granule (LQHBG), a compound traditional Chinese herbal medicine, on oxidative stress-induced injury in rabbit retinal pigment epithelial (RPE) cells in vitro.
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Objective: To investigate the effects of Ginkgo biloba extract (EGb 761) on the morphology and function of retinal ganglion cells (RGC) in guinea pigs with optic nerve transection. Methods: Seventy-five albino guinea pigs were randomly divided into five groups: normal control group, sham-operated group, untreated group, normal saline group and EGb 761 group. No operation was performed in the normal control group. Optic nerve was merely exposed in the sham-operated group, but transected at 1.0 mm from posterior pole of the eye ball in the untreated, normal saline and EGb 761 groups. Guinea pigs in the EGb 761 group or the normal saline group received daily intraperitoneal injection of EGb 761 (100 mg/kg) or corresponding volume of normal saline from 7 days before experiment to 28 days after experiment. Three guinea pigs in each group were sacrificed for apoptosis assay (TUNEL method) of RGC. Pattern electoretinograms (PERGs) were recorded 14 and 28 days after transection, respectively. At the end of the examination, six guinea pigs were killed for histological examination and RGC count. Results: No TUNEL-positive cells were observed in the normal control, sham-operated and EGb 761 groups, but there were TUNEL-positive cells in the untreated group and the normal saline group. The numbers of RGCs in the untreated and normal saline groups were less than those in the normal control and sham-operated groups at 14 days or 28 days (P0.05) at 14 days or 28 days. The number of RGCs was positive correlated to N(95) amplitude (r=0.859, P=0.001 5). Conclusion: EGb 761 can inhibit the apoptosis of RGCs in guinea pigs after optic nerve transection, thus protect the morphology and function of RGCs.
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To observe the protective effect of Huangban Granule, a compound of traditional Chinese herbal medicine, on rats with retinal damage induced by light.