Volume 5,Issue 5,2012 Table of Contents

1 The expression and distribution of α-Gal gene in various species ocular surface tissue

Yi Shao , Yao Yu , Chong-Gang Pei , Yangluowa Qu , Gui-Ping Gao , Ji-Lin Yang , Qiong Zhou , Lu Yang , Qiu-Ping Liu

2012, 5(5):543-548. DOI: 10.3980/j.issn.2222-3959.2012.05.01

[Abstract](2253) [HTML](0) [PDF 3.87 M](1000)

Abstract:
AIM: To examine the α-Gal gene expression and distribution in the different species/genus and developing phase animal ocular surface tissue.METHODS: α-Gal binding assay were carried out on various animal eye sections. Photograph, slit-lamp observation on various eye showed normal corneal transparence.RESULTS: A strong α-Gal expression in invertebrates and some vertebrates ocular tissue, but no α-Gal binding in birds, fish and mammal. α-Gal expression change in the development of mice ocular surface tissue (except sclera) and display genus dependency in the different murine ocular surface tissue.CONCLUSION: This study identified specific α-Gal epitopes binding area in the ocular surface of several species and may solve the problem that naive ocular surface may be used as natural α-Gal gene knockout model/high risk immunologic rejection model or ocular surface scaffold material.

2 Effects of preservation time on proliferative potential of human limbal stem/progenitor cells

Ting Liu , Yao Wang , Hao-Yun Duan , Ming-Li Qu , Ling-Ling Yang , Yuan-Yuan Xu , Xin-Jie Zang , Qing-Jun Zhou

2012, 5(5):549-554. DOI: 10.3980/j.issn.2222-3959.2012.05.02

[Abstract](1682) [HTML](0) [PDF 1.75 M](1164)

Abstract:
AIM: To determine the proliferative potential and the maintenance of stem cell activity in stored human limbal tissues, and correlate this with the preservation time, cell viability and the expression of stem cell markers.METHODS: Thirty limbal rims were split into 4 parts and stored in corneal preservation medium at 4℃ for 0, 1, 4, or 7 days. The limbal stem cell and mitotic markers P63, CK19, proliferating cell nuclear antigen (PCNA), and Ki67 were determined by immunohistochemical staining. The proliferative potential of limbal epithelial cells was assessed by cell viability, the ability of generating stratified epithelium, and colony forming assay.RESULTS: The stored tissues maintained limbal stratified structure to 7 days and exhibited comparable expression level of stem cell and mitotic markers. The proportion of viable cells decreased with the prolonged preservation time, while colony forming efficiency decreased from the 1^st day and disappeared at the 4^th day. When inoculated on amniotic membrane, the cells preserved for 1 day formed a stratified epithelium, while the cells from 4 days’ preservation formed a discontinuous layer.CONCLUSION: The colony forming efficiency of limbal epithelial stem/progenitor cells decreased rapidly with the increasing preservation time, while the expression level of markers and capacity of forming epithelial monolayer on amniotic membrane decreased gradually. The limbal epithelial stem cells lost their function earlier than the lost expression level of stem cell markers. This may help us to better choose the appropriate preservation grafts for future limbal stem cell transplantation.

3 Homemade lyophilized cross linking amniotic sustained-release drug membrane with anti-scarring role after filtering surgery in rabbit eyes

Wan Li , Wen-Jian Chen , Wei Liu , Liang Liang , Ming-Chang Zhang

2012, 5(5):555-561. DOI: 10.3980/j.issn.2222-3959.2012.05.03

[Abstract](2056) [HTML](0) [PDF 5.95 M](1032)

Abstract:
AIM: To investigate the antifibrotic effect of the freeze-dried bilayered fibrin-binding amniotic membrane as a drug delivery system on glaucoma surgery in rabbit model. The aim of this study was to prepare a novel local delivery system for the sustained and controllable release of 5-Fu.METHODS: Twenty-four Japanese white rabbits were randomized into three groups: the experimental group (ocular trabeculectomy in combination with 5-Fu loaded freeze-dried bilayered fibrin-binding amniotic membrane transplantation), the control group (ocular trabeculectomy in combination with 5-Fu) and the blank group (single trabeculectomy). HE staining, massion staining and immunohistochemistry for α-SMA were performed on days 7, 14, 21 and 30 following surgery. The concentration of 5-Fu in rabbit aqueous humor was examined by high performance liquid chromatography (HPLC) 3 days after the surgery. RESULTS: Statistical differences were noted in intraocular pressure among groups on day 7, 14, 21 and 30 following surgery. Histology further demonstrated that trabeculectomy in combination with freeze-dried bilayered fibrin-binding amniotic membrane yielded well wound healing and no scar formation and was beneficial for long term effect.CONCLUSION: HPLC showed a good slow-release effect with freeze-dried bilayered fibrin-binding amniotic membrane.

4 Adenoviral 15-lipoxygenase-1 gene transfer inhibits hypoxia-induced proliferation of retinal microvascular endothelial cells in vitro

Ying Yan , Tao He , Ying Shen , Xiao Chen , Bo Diao , Zhi Li , Qing Liu , Yi-Qiao Xing

2012, 5(5):562-569. DOI: 10.3980/j.issn.2222-3959.2012.05.04

[Abstract](2071) [HTML](0) [PDF 2.23 M](1046)

Abstract:
AIM: To investigate whether 15-Lipoxygenase-1 (15-LOX-1) plays an important role in the regulation of angiogenesis, inhibiting hypoxia-induced proliferation of retinal microvascular endothelial cells (RMVECs) and the underlying mechanism.METHODS: Primary RMVECs were isolated from the retinas of C57/BL6J mice and identified by an evaluation for FITC-marked CD31. The hypoxia models were established with the Bio-bag and evaluated with a blood-gas analyzer. Experiments were performed using RMVECs treated with and without transfer Ad-15-LOX-1 or Ad-vector both under hypoxia and normoxia condition at 12, 24, 48, 72 hours. The efficacy of the gene transfer was assessed by immunofluorescence staining. Cells proliferation was evaluated by the CCK-8 method. RNA and protein expressions of 15-LOX-1, VEGF-A, VEGFR-2, eNOs and PPAR-r were analyzed by real-time reverse transcription polymerase chain reaction (RT-PCR) and Western blot.RESULTS: Routine evaluation for FITC-marked CD31 showed that cells were pure. The results of blood-gas analysis showed that when the cultures were exposed to hypoxia for more than 2 hours, the Po2 was 4.5 to 5.4 Kpa. We verified RMVECs could be infected with Ad-15-LOX-1 or Ad-vector via Fluorescence microscopy. CCK-8 analysis revealed that the proliferativecapacities of RMVECs in hypoxic group were significantlyhigher at each time point than they were in normoxic group (P<0.05). In a hypoxic condition, the proliferativecapacities of RMVECs in 15-LOX-1 group were significantly inhibited (P<0.05). Real-time RT-PCR analysis revealed that the expressions of VEGF-A, VEGF-R2 and eNOs mRNA increased in hypoxia group compared with normoxia group (P<0.01). However, the expressions of 15-LOX-1, PPAR-r mRNA decreased in hypoxia group compared with normoxia group (P<0.01). It also showed that in a hypoxic condition, the expressions of VEGF-A, VEGF-R2 and eNOs mRNA decreased significantly in 15-LOX-1 group compared with hypoxia group (P<0.01). However, 15-LOX-1 and PPAR-r mRNA increased significantly in 15-LOX-1 group compared with hypoxia group (P<0.01). There was no significant difference of the mRNA expressions between vector group and hypoxia group (P>0.05). Western blot analysis revealed that the expressions of relative proteins were also ranked in that order.CONCLUSION: Our results suggested that 15-LOX-1 and PPAR-r might act as a negative regulator of retinal angiogenesis. And the effect of 15-LOX-1 overexpression is an anti-angiogenic factor in hypoxia-induced retinal neovascularization (RNV). Overexpression 15-LOX-1 on RMVECs of hypoxia-induced RNV blocked signaling cascades by inhibiting hypoxia-induced increases in VEGF family. PPAR-r effect on VEGFR2 could be an additional mechanism whereby 15-LOX-1 inhibited the hypoxia-induced RNV.

5 Regulation of Eaf2 in mouse lens cells apoptosis induced by ultraviolet radiation

Fan Xiao , Jin-Song Zhang , Jiang-Yue Zhao , Di Wu

2012, 5(5):570-575. DOI: 10.3980/j.issn.2222-3959.2012.05.05

[Abstract](2035) [HTML](0) [PDF 1.62 M](1090)

Abstract:
AIM: To investigate the regulation of Eaf2 protein in mouse lens cells apoptosis induced by ultraviolet (UV) radiation.METHODS: An eye of Eaf2 gene knockout mice or normal control mice was exposed to UV radiation, and the other one was non-exposed. All of lenses were analyzed by TUNEL and caspase 3 activity assays to determine the difference of the apoptosis induced by UV radiation. In addition, exposed and non-exposed lenses were analyzed by quantified p53 expression and real-time reverse transcription-polymerase chain reaction (RT-PCR) of Bax, Bid, Apaf-1, Puma and Noxa, to compare Eaf2 gene knockout mice and normal control mice.RESULTS: UV radiation caused apoptosis of lens cells in normal control mice and Eaf2 knockout mice. Activity of caspase 3 was significantly higher in normal control mice than Eaf2 knockout mice. Expression of p53 protein was significantly higher in lenses exposed to UV radiation than nonexposed lenses, but was similar between Eaf2 gene knockout mice and normal control mice in the same UV condition. After exposing to UV radiation, the analysis of real-time RT-PCR demonstrated that mRNA levels of Puma and Noxa were significantly higher in lenses of normal control mice than Eaf2 gene knockout mice, and that mRNA levels of Bax, Bid and Apaf-1 were not significantly different between gene knockout mice and normal control mice.CONCLUSION: Eaf2 increases lens cells apoptosis induced by ultraviolet radiation. And Eaf2 up-regulates expression of the Puma and the Noxa to act on lens cells apoptosis after UV radiation.

6 Interference of Y-27632 on the signal transduction of transforming growth factor beta type 1 in ocular Tenon capsule fibroblasts

Xiao-Hui Zhang , Nai-Xue Sun , Zhao-Hui Feng , Chao Wang , Yi Zhang , Jian-Ming Wang

2012, 5(5):576-581. DOI: 10.3980/j.issn.2222-3959.2012.05.06

[Abstract](1887) [HTML](0) [PDF 1.60 M](1092)

Abstract:
AIM: To investigate the interfering effect of Y-27632, a ROCK-I selective inhibitor, on the signal transduction pathway of transforming growth factor-β1 (TGF-β1) in ocular Tenon capsule fibroblasts (OTFS) in vitro. METHODS: After OTFS from passages 4 to 6 in vitro were induced by TGF-β1 and then treated by Y-27632, the changes of the OTFS cell cycles were analyzed via flow cytometry, and the proteins expression of the α-smooth muscular actin (α-SMA), connective tissue growth factor (CTGF), collagen I were calculated by Western blot. After OTFS treated by the different concentrations of Y-27632, the expression levels of the α-SMA, CTGF and collagen I mRNA were assayed by RT-PCR. RESULTS: Y-27632 had no markedly effect on the OTFS cell cycles. After treated by TGF-β1, OTFS in G1 period significantly increased. The cell cycles distribution by both TGF-β1 and Y-27632 had no remarkable difference from that in control group. Y-27632 significantly inhibited the proteins expressions of both α-SMA and CTGF, while to some extent inhibited that of collagen I. TGF-β1 significantly promoted the proteins expressions of α-SMA, CTGF and collagen I. After OTFS treated by both TGF-β1 and Y-27632, of α-SMA, the protein expression was similar with that in control group (P=0.066>0.05), but the protein expression of CTGF or collagen I, respectively, was significantly different from that in control group (P=0.000<0.01). The differences of expressions of the α-SMA, CTGF and collagen I mRNA in 30, 150, 750μmol/L Y-27632 group were statistically significant, compared with those in control group, respectively (α-SMA, P=0.002, 0.000, 0.000; CTGF, P=0.014, 0.002, 0.001; collagen I, P=0.003, 0.002, 0.000). CONCLUSION: Blocking the Rho/ROCK signaling pathway by using of Y-27632 could inhibit the cellular proliferation and the expression of both CTGF and α-SMA whatever OTFS induced by TGF-β1 or not. Y-27632 suppressed the expression of collagen I mRNA without induction.

7 Evaluation of the new OxyPlate^TMAnaerobic System for the isolation of ocular anaerobic bacteria

Emily K. Deschler , Paul P. Thompson , Regis Paul Kowalski

2012, 5(5):582-585. DOI: 10.3980/j.issn.2222-3959.2012.05.07

[Abstract](2393) [HTML](0) [PDF 537.32 K](1050)

Abstract:
AIM: Anaerobic bacteria can cause ocular infections. We tested the OxyPlate^TM Anaerobic System (OXY) to isolate pertinent anaerobic bacteria that can cause ocular disease.METHODS: OXY, which does not require direct anaerobic conditions (i.e. bags, jars), was compared to conventional isolation of incubating culture media in anaerobic bags. Standard colonies counts were performed on anaerobic ocular bacterial isolates under aerobic and anaerobic conditions (anaerobic bags) using agar media: 1) OXY (aerobic only), 2) 5% sheep blood (SB), 3) Chocolate, and 4) Schaedler. The bacteria tested were de-identified ocular isolates cultured from endophthalmitis and dacryocystitis that include 10 Propionibacterium acnes and 3 Actinomyces species. The colony counts for each bacteria isolate, on each culturing condition, were ranked from largest to smallest, and non-parametrically compared to determine the best culturing condition.RESULTS: All anaerobic conditions were positive for all of the anaerobic isolates. SB and Schaedler’s agar under aerobic conditions did not support the growth of anaerobic bacteria. Sparse growth was noted on chocolate agar with Propionibacterium acnes. As an anaerobic system, SB in an anaerobic bag isolated higher colony counts than OXY (P=0.0028) and chocolate agar (P=0.0028).CONCLUSION: Although OXY did not test to be more efficient than other anaerobic systems, it appears to be a reasonable alternative for isolating anaerobic bacteria from ocular sites. The use of an agar medium in a specially designed plate, without the requirement of an anaerobic bag, rendered OXY as an advantage over other anaerobic systems.

8 Ferrara ring segments implantation for treating keratoconus

Mohammed Ali Abu Ameerh , Ghada Ismail Hamad , Osama H. Ababneh , Almutez M. Gharaibeh , Rola M. Al Refai , Muawyah D. Al Bdour

2012, 5(5):586-590. DOI: 10.3980/j.issn.2222-3959.2012.05.08

[Abstract](2093) [HTML](0) [PDF 1.55 M](1090)

Abstract:
AIM: To investigate the efficacy of Ferrara rings (FR) implantation in the treatment of keratoconus.METHODS: It was a retrospective case series descriptive study. The sample was comprised of 50 patients 79 eyes diagnosed with progressive keratoconus. This included 24 (48%) males and 26 (52%) females between the age of 13 and 44 years. All participants underwent surgical implantation of FR in the period between January 2009 and September 2010 at Jordan University Hospital. Thorough ophthalmologic examinations were applied to measure vital variables for each pathological condition before and after surgery.RESULTS:Findings indicated an overall significant postoperative improvement in both uncorrected visual acuity (UCVA) and best spectacle corrected visual acuity (BSCVA) throughout follow up visits. Moreover, results illustrated a significant decrease in spherical equivalent (SE) and keratometric readings (lower, higher and the average).CONCLUSION: Surgical intervention strategies are being frequently developed to meet the needs of patients with keratoconus. The implantation of Ferrara rings has proven to be a safe and feasible alternative procedure for the treatment of mild-moderate keratoconus especially for patients with contact lenses intolerance. We have found that this procedure has improved visual outcomes in all eyes studied. Nevertheless, further research is needed to investigate long term outcomes.

9 Non-buckled vitrectomy for retinal detachment with inferior breaks and proliferative vitreoretinophathy

Yan Sheng , Wen Sun , Bin Mo , Ya-Jie Yu , Yang-Shun Gu , Wu Liu

2012, 5(5):591-595. DOI: 10.3980/j.issn.2222-3959.2012.05.09

[Abstract](2605) [HTML](0) [PDF 246.96 K](1673)

Abstract:
AIM: To investigate the efficacy of non-buckled vitrectomy with classical endotamponade agents in the treatment of primary retinal detachment (RD) complicated by inferior breaks and proliferative vitreoretinophathy (PVR).METHODS: A retrospective, consecutive and case series study of 40 patients with inferior break RD and PVR ≥C1 was conducted. All patients underwent a standard 3-port 20-gauge pars plana vitrectomy (PPV) with gas or silicone oil tamponade without supplementary scleral buckling. The vitreous and all proliferative membrane were completely removed, and retinectomy was performed when necessary. The mean follow-up was 12.5 months. The primary and final anatomic success rate, visual acuity and complications were recorded and analyzed.RESULTS: Primary anatomic success rate was achieved in 35 of 40 eyes (87.5%) and the final anatomic success rate was 100%. The most common cause of redetachment was recurrent PVR. The best-corrected visual acuity (BCVA) at final follow-up was improved in 34 eyes (85%), remained stable in 1 eye (2.5%), and worsened in 5 eyes (12.5%). The mean visual acuity at final follow-up was improved significantly (P=0.000).CONCLUSION: This retrospective study provides evidence that vitrectomy without scleral buckling seemed to be an effective treatment for inferior break RD with PVR. With complete removal of vitreous and proliferative membranes and timing of retinectomy, the inferior breaks which complicated with PVR could be closed successfully without additional scleral buckling.

10 Effect of low molecular weight heparin (enoxaparin) on congenital cataract surgery

Ihsan Çaça , Alparslan Şahin , Abdullah Kürsat Cingü , Şeyhmus Ari , Fuat Alakuş , Yasin Çinar

2012, 5(5):596-599. DOI: 10.3980/j.issn.2222-3959.2012.05.10

[Abstract](2393) [HTML](0) [PDF 251.35 K](1103)

Abstract:
AIM: To assess the efficacy of intracameral enoxaparin (a low-molecular-weight heparin) infusion, in variable doses on postoperative inflammatory response in congenital cataract surgery.METHODS: It is aprospective, randomized controlled trial. Eighty eyes of 53 children with congenital cataract were enrolled in this study. Every eye had primary posterior capsulorrhexis and intraocular lens (IOL) implantation after lens aspiration. The eyes were divided into 4 equal groups. In group 1 balanced salt solution (BSS) without enoxaparin was used as an irrigation solution. Whereas in group 2, 3 and 4, 40mg, 20mg and 10mg enoxaparin in 500mL BSS was used respectively. The inflammatory response in the anterior chamber was compared among the groups with slit-lamp biomicroscopy.RESULTS: The mean follow-up period was (17.75±3.95) months in group 1, (18.00±5.15) months in group 2, (19.20±5.47) months in group 3 and (18.65±5.16) months in group 4. Mean number of inflammatory cells in the anterior chamber in group 1 was significantly higher than that of group 2, 3, 4 (P<0.001). There was fibrin formation in the anterior chambers of 3 eyes in group 1 and one eye in group 4. There was synechiae formation in 3 eyes of group 1 and one eye of group 4. There was no significant difference among the groups by means of fibrin or synechiae formation (P>0.05). There were IOL precipitates in 4 eyes of group 1 and 2 eyes of group 4. IOL precipitate formation was significantly higher in group 1 than that of group 2 and 3 in which there was no IOL precipitate (P=0.048). There was IOL subluxation in only one eye of group 1, 3 and 4 while no subluxation was observed in group 2 (P>0.05). There was no statistically significant difference detected about IOL subluxation occurance in all 4 groups (P>0.05).CONCLUSION: Complications of cataract surgery in congenital cataract patients associated with postoperative inflammatory response found to be decreased with the use of enoxaparin in intraocular infusion solutions. Furthermore according to our results the anti-inflammatory effect of enoxaparin was dose dependant.

11 Clinical presentation of a mixed 23-gauge infusion and 20-gauge pars plana technique for active silicone oil removal

Jian-Qin Lei , An-Ming Xie , Qiang Shi

2012, 5(5):600-604. DOI: 10.3980/j.issn.2222-3959.2012.05.11

[Abstract](4311) [HTML](0) [PDF 779.69 K](1019)

Abstract:
AIM: To present with a clinical case series of a mixed 23-gauge infusion and 20-gauge pars plana technique for 5,700-centipoise silicone oil removal (SOR), and to discuss its efficacy and safety.METHODS: This is a retrospective, non-randomized controlled study. We performed SOR with 23-gauge infusion and 20-gauge active suction technique on 29 patients 29 eyes from April to October, 2011 (mixed group). During the surgeries, a 23-gauge sclerotomy was made for infusion and a 20-gauge sclerotomy was used for active silicone oil suction. Anterior segment optical coherence tomography (OCT) was applied for 23-gauge sclerotomy analysis 1 day post-operation. Traditional 20-gauge SOR was performed on another consecutive 29 patients 29 eyes, the control group (20G group).RESULTS: There were 2 eyes (6.9%) in mixed group and 5 eyes (17.2%) in 20G group which had recurrent retinal detachment after surgery. Hopytony (IOP≤6mmHg) occurred in 8 eyes (27.6%) of mixed group and in 10 eyes (34.5%) of 20G group post-operation, but all of them recovered to the normal level finally. There were no statistical significant differences. Final visual acuity was significantly increased after surgery in both groups. Anterior segment OCT images were acquired from 13 eyes of mixed group, and all of them had a proper wound apposition. But local ciliary detachment was found in 9 eyes (69%). It was hard to define the OCT image of the sclerotomies and ciliary body because of the serious conjunctival hemorrhages and chemosis in 20G group.CONCLUSION: This mixed technique is a convenient and effective way to remove high viscosity silicone oil. Compared with traditional 20-gauge SOR, it does not increase the risk of post-operative complications and has less conjunctival reactions.. Transient postoperative hypotony is common for this procedure and subclinical ciliochoroidal detachment is a probable cause.

12 Effects of body mass index on intraocular pressure and ocular pulse amplitude

Remzi Karadag , Zeynel Arslanyilmaz , Bahri Aydin , Ibrahim F. Hepsen

2012, 5(5):605-608. DOI: 10.3980/j.issn.2222-3959.2012.05.12

[Abstract](3194) [HTML](0) [PDF 298.36 K](1187)

Abstract:
AIM: To investigate the effects of body mass index (BMI) on intraocular pressure (IOP) and ocular pulse amplitude (OPA).METHODS: Totally 140 healthy individuals without any systemic diseases were included in the study. BMI (kg/m²) was calculated for every individual. IOP and OPA were measured with Pascal Dynamic contour tonometer (DCT). Blood pressure was also measured along with the DCT. The patients were divided into three groups according to BMI as: Group1, BMI<25; Group2, 25≤BMI<30; Group3, BMI≥30. Mean values of IOP, OPA, systolic blood pressure (SBP) and diastolic blood pressure (DBP) were used in statistical analysis.RESULTS: In Group1, the means of IOP, OPA, were 16.8±2.3mmHg, 2.7±0.7mmHg respectively; and SBP, DBP were 120.0±6.1mmHg, and 77.4±5.6mmHg respectively. In group2, the mean IOP, OPA, SBP, and DBP were found to be 16.6±2.1mmHg, 2.4±0.7mmHg, 121.7±5.3mmHg, and 79.5±4.9mmHg respectively. In group3, the mean IOP, OPA, SBP, and DBP were found to be 17.3±1.7mmHg, 2.1±0.7mmHg, 122.4±5.7mmHg, and 79.7±5.2mmHg respectively. There were no statistically significant difference between groups in terms of IOP, SBP and DBP, while OPA values were significantly lower in group3 (P=0.001).CONCLUSION: Decreased OPA values in individuals with higher BMI may indicate that subjects with higher BMI have lower choroidal perfusion and lower ocular blood flow.

13 Tissue factor with age-related macular degeneration

Guan-Feng Wang , Xiu-Lan Zou

2012, 5(5):609-613. DOI: 10.3980/j.issn.2222-3959.2012.05.13

[Abstract](2106) [HTML](0) [PDF 203.69 K](1044)

Abstract:
Wet age-related macular degeneration which incidence increases year by year is a blinding eye disease, but current clinical methods of treatment on this disease arelimited and the outcome is not ideal. Recent studies have found abnormally high expression of tissue factors which are targets for the treatment of wet age-related macular degeneration to achieve a certain effect in the choroidal neovascularization. Related literatures are reviewed as following.

14 Research progress on the negative factors of corneal endothelial cells proliferation

Yu-Bo Cui , Jing Wu

2012, 5(5):614-619. DOI: 10.3980/j.issn.2222-3959.2012.05.14

[Abstract](2194) [HTML](0) [PDF 315.76 K](1063)

Abstract:
The human corneal endothelium forms a boundary layer between anterior chamber and corneal stoma. The corneal endothelial cells are responsible for maintaining cornea transparency, which is very vital for our visual acuity, via its pump and barrier functions. The adult corneal endothelial cells in vivo lack proliferation in response to the cell loss caused by outer damages and diseases. As a result, in order to compensate for cell loss, corneal endothelial cells migrate and enlarge while not via dividing to increase the endothelial cell density. Therefore, it is not capable for corneal endothelium to restore the corneal clarity. Some researches have proved that in vitro the corneal endothelial maintained proliferation ability. This review describes the current research progress regarding the negative factors that inhibit proliferation of the corneal endothelial cells. This review will mainly present several genes and proteins that inhibit the proliferation of the corneal endothelial cells, of course including some other factors like enzymes and position.

15 Statistical virtual eye model based on wavefront aberration

Jie-Mei Wang , Chun-Ling Liu , Yi-Ning Luo , Yi-Guang Liu , Bing-Jie Hu

2012, 5(5):620-624. DOI: 10.3980/j.issn.2222-3959.2012.05.15

[Abstract](2499) [HTML](0) [PDF 973.61 K](1200)

Abstract:
Wavefront aberration affects the quality of retinal image directly. This paper reviews the representation and reconstruction of wavefront aberration, as well as the construction of virtual eye model based on Zernike polynomial coefficients. In addition, the promising prospect of virtual eye model is emphasized.

16 Retinoblastoma in a young adult mimicking Coats’ disease

Zheng Zhang , Ji-Tong Shi , Ning-Li Wang , Jian-Min Ma

2012, 5(5):625-629. DOI: 10.3980/j.issn.2222-3959.2012.05.16

[Abstract](2096) [HTML](0) [PDF 2.89 M](1187)

Abstract:
Retinoblastoma is the most common childhood primary intraocular malignancy, with the majority of cases being diagnosed before 5 years of age. Retinoblastoma in adults is extremely rare. Here, we report the case of a 20-year-old man who presented with a 3 year history of blurred vision in the right eye. Imaging did not reveal the typical presentation of retinoblastoma. After considering Coats’ disease, a diagnosis of late-presenting retinoblastoma was made through cytological analysis. Diagnosis of retinoblastoma should be considered in the presence of uncertain mass lesions in the fundus of an adult.

17 Conductive keratoplasty: an approach for the correction of residual hyperopia in post-lasik pseudophakia

Pan-Pan Ye , Wen Xu , He-Sheng Xu , Zhao-Chun Li , Jun-Ting Shi , Feng-Ying He , Ke Yao

2012, 5(5):630-633. DOI: 10.3980/j.issn.2222-3959.2012.05.17

[Abstract](2766) [HTML](0) [PDF 1.63 M](2088)

Abstract:
Although there are many formulae for the calculation of intraocular lens power in the eyes with previous kerato-refractive surgeries, unexpected refractive bias still exists. Hyperopic bias is particularly disliked because it affects both uncorrected distance and near visual acuity. Surgical treatment of the residual hyperopia for the eyes with both laser in situ keratomileusis and cataract surgery remains to be a big problem. Conductive keratoplasty has been shown to be an effective, safe and predictable method for low and moderate hyperopia in the pseudophakic eyes or in the eyes with kerato-refractive surgeries. However, the efficacy and safety of conductive keratoplasty in the correction of residual hyperopia after both corneal and lens refractive surgeries has not been reported. Herein, we reported the surgical correction with conductive keratoplasty for cases of residual hyperopia with/without astigmatism after previous laser in situ keratomileusis for high myopia and following phacoemulsification combined with posterior intraocular lens implantation for complicated cataract.

18 Superglue injuries of the eye

Sagili Chandrasekhara Reddy

2012, 5(5):634-637. DOI: 10.3980/j.issn.2222-3959.2012.05.18

[Abstract](7830) [HTML](0) [PDF 669.75 K](1553)

Abstract:
AIM: To report various ocular lesions caused by accidental instillation of superglue.METHODS: Three cases of ocular injuries are described in children aged 6 years, 3 years and 8 months, following accidental instillation of superglue in the eye.RESULTS: In the first case there was sticking of eyelashes in the medial 1/3 of eyelids in both eyes. In the second case sticking of eye lashes was present in the lateral 1/3 of eyelids in the left eye. In the third case, superglue was present on the right cheek, above the right ear and sticking of eyelids in medial 1/3 in right eye. The eyelids were separated by pulling the lid margins with fingers in the first case and later on superglue was removed by trimming the eyelashes; and by direct trimming the eyelashes in second and third cases. There was no injury to other structures of anterior segment in the first two cases. However, removal of the superglue on the cornea resulted in corneal abrasion in the third case which healed with medical treatment and patching of the right eye.CONCLUSION: Accidental instillation of superglue is possible because of the appearance of the tube like eye ointment tube. Immediate medical aid will prevent ocular morbidity.

19 Eye health is everyone’s responsibility: China’s first Western-style eye hospital improves in the prevention of blindness

Hao-Tian Lin , Li-Xia Luo , Wei-Rong Chen , Yi-Zhi Liu

2012, 5(5):638-640. DOI: 10.3980/j.issn.2222-3959.2012.05.19

[Abstract](2152) [HTML](0) [PDF 1.54 M](1126)

Abstract:
AIM: To investigate the relationship between China’s first Western-style eye hospital development and the prevention of blindness in China and determine the main factor influencing eye health today.METHODS: Data about eye health, blindness and cataract surgery rate of China from public website of World Health Organization (WHO), ORBIS International, Ministry of Health (MOH) of China, Pubmed center and Historical Archives of Zhongshan Ophthalmic Center (ZOC) were reviewed and analyzed.RESULTS: ZOC is China’s first Western-style eye hospital. In 2012, the ORBIS Flying Eye Hospital has chosen ZOC once again as one of its destinations, 30 years after ORBIS expanded internationally to train eye care professionals and treat underserved patients in developing countries in 1982. During the past 30 years, cataract surgery rate and public awareness of blindness prevention were improved greatly in China, in which ZOC plays a very important role.CONCLUSION: ZOC, as China’s first Western-style eye hospital，has improved in the prevention of blindness. Eye health has become everyone’s responsibility.

20 Studies of a pedigree with limbal dermoid cyst

Jing Zhu , Hong-Bo Cheng , Ning Fan , Chun-Ming Liu , Wen-Han Yu , Xiao-Ming Chen , Xu-Yang Liu

2012, 5(5):641-643. DOI: 10.3980/j.issn.2222-3959.2012.05.20

[Abstract](2262) [HTML](0) [PDF 2.40 M](1021)

Abstract:
AIM: To study clinical features and gene mutations within the paired-like homeodomain transcription factor 2 (PITX2) gene in a pedigree of bilateral limbal dermoids.METHODS: Complete eye examinations have been performed on each individual of the family. Exons of paired-like homeodomain transcription factor 2 (PITX2) were amplified by polymerase chain reaction, sequenced, and compared with a reference database.RESULTS: We described the phenotype, clinic findings in a family with two affected members. The masses of the proband’s eyes were excised surgically demonstrating a dermoid cyst by histopathological examination. No mutation was detected in the gene PITX2 in this pedigree.CONCLUSION: A family of limbal dermoid cyst was reported.In addition, no pathogenic sequence variations were found in PITX2, indicating that this phenotype in this family is a distinctive entity.

21 Multi-modality imaging on multiple evanescent white dot syndrome-A Spectralis Study

Rui Hua , Kang Chen , Li-Min Liu , Ning-Ning Liu , Lei Chen , Wei-Ping Teng

2012, 5(5):644-647. DOI: 10.3980/j.issn.2222-3959.2012.05.21

[Abstract](3241) [HTML](0) [PDF 2.73 M](1060)

Abstract:
AIM: To present retinal microstructure, metabolism and function abnormalities in the course of multiple evanescent white dot syndrome (MEWDS) by Heidelberg spectralis modality imaging platform and observe its outcome by EDI-SD-OCT and two wavelength autofluorescence.METHODS: A case of multiple evanescent white dot syndrome in a 23-year-old female presented initially with a 15-day history of floaters and a central scotoma in the right eye. To establish the diagnosis, multimodality imaging was performed, namely, blue light-fundus autofluorescence (BL-FAF, excitation 488nm, emission >500nm), near-infrared fundus autofluorescence (NIR-FAF, excitation 787nm, emission >800nm) using a confocal scanning laser ophthalmoscope, fundus fluorescein angiography (FFA), indocyanine green angiography (ICGA), spectrum-domain enhance depth imaging optical coherence tomography (SD-EDI-OCT), multifocal electroretinography (mf-ERG) and fundus photogragh were performed and followed up at the eighth month after initially visiting.RESULTS: Optical coherence tomography(OCT) showed a transient disruption of the foveal photoreceptor outer segments in correspondence to foveal granularity. NIR-FAF showed hypoautofluorescent areas, ≤40μm in size, mostly concentrated around the posterior pole and its temporal side less than that in BL-FAF. Mf-ERG show pinnacle disappeared in fovea and macula and responses decreased markedly compared with the follow eye. At the eighth month follow up, hyperfluorescence in BL-FAF were disappear, while, NIR-FAF Hypofluorescent spots in early stage of such lesion were reduced. But OCT demonstrated the structure was recovered in residual Hypofluorescent area in NIR-FAF. The subfoveal choroidal thickness was decreased from 372μm to 307μm slightly and cost line was recovered.CONCLUSION: MEWDS is a benign self-healing disease and there is no pathological evidence to investigate the natural course of such disease. SD-OCT allows highly detailed images approaching histopathology to certify the microstructural changes. Two-wave length FAF and mf-ERG provide more information about metabolism in outer retina especial RPE and photoreceptor. Spectralis OCT combined with two-wavelength FAF and mf-ERG provide a new way to analyze this disease and offer more details for therapy and follow-up.

22 Cataract surgery and intraocular lens implantation in anterior megalophthalmos

Yun Li , Fei Liu , Qian Zhang , Yu Xiong

2012, 5(5):648-649. DOI: 10.3980/j.issn.2222-3959.2012.05.22

[Abstract](1962) [HTML](0) [PDF 470.82 K](1085)

Abstract:

23 Abruptly developed large esotropia after full time occlusion therapy in anisometropic amblyopia

Huijae Lee , Ungsoo Samuel Kim

2012, 5(5):650-651. DOI: 10.3980/j.issn.2222-3959.2012.05.23

[Abstract](2473) [HTML](0) [PDF 525.04 K](1087)

Abstract:

24 Jerky see-saw nystagmus in internuclear ophthalmoplegia from a lower pontine lesion

Jing-Wen Gong , Jin Jiang , Zhao-Hui Sun

2012, 5(5):652-654. DOI: 10.3980/j.issn.2222-3959.2012.05.24

[Abstract](2694) [HTML](0) [PDF 1.20 M](1344)

Abstract:

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Volume 5,Issue 5,2012 Table of Contents