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AIM: To compare the clinical efficacy of the Balanced energy system versus the conventional torsional ultrasound system in phacoemulsification surgeries for cataracts with varying nuclear hardness.METHODS: In this study, 120 patients(122 eyes)with age-related cataracts scheduled for surgery between November 2021 and November 2022 at our hospital were randomly divided into two groups: 58 patients(59 eyes)in the experimental group underwent surgery using the Balanced energy system, while 62 patients(63 eyes)in the control group were treated with the conventional torsional ultrasound system. Intraoperative cumulative dissipated energy(CDE), case time(CT), aspiration time(AST), and estimated fluid used(EFU)were recorded. Patients were followed-up for 3mo to examine and record the best-corrected visual acuity(BCVA)and corneal endothelial cell density(ECD), and to calculate the rate of endothelial cell loss.RESULTS: Comparing the intraoperative parameters between the two groups, there was no significant difference in CT(P>0.05), but the CDE, AST and EFU of the patients in the experimental group were lower than those of the control group(P<0.05), and the CDE of patients with grade III nuclear hardness in the experimental group was lower than the control group(P<0.05), CDE, AST and EFU in patients with grade IV nuclear hardness were lower than those in the control group(P<0.05). After 3mo of follow-up, BCVA in both groups improved significantly, and the experimental group recovered faster than the control group. At 3mo after surgery, the ECD of the two groups of patients was reduced compared with that before surgery(P<0.01), but there were no significant differences in ECD and endothelial cell loss rates between the experimental and control groups before and at 3mo after surgery(P>0.05). In grade IV nuclear hardness cataracts, the rate of endothelial cell loss in the experimental group was significantly lower than that in the control group(4.63%±4.10% vs. 6.63%±4.49%, P<0.01).CONCLUSION: The Balanced energy system and the conventional torsional ultrasound system both show high safety and efficiency in phacoemulsification of cataracts with different nuclear hardness. However, the former demonstrates substantial advantages in cases with dense nuclei, offering lower ultrasound energy, shorter aspiration and infusion times, and reduced volume of infusion fluid.
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AIM: To evaluate the efficacy of Ahmed glaucoma valve implanting through the ciliary sulcus in the treatment of intraocular lens(IOL)glaucoma.METHODS: Retrospective case series study. The clinical data of 18 patients(18 eyes)with IOL glaucoma from February 2020 to February 2022 in Liuzhou Red Cross Hospital were collected. All patients underwent Ahmed glaucoma valve implanting through the ciliary sulcus. The visual acuity, intraocular pressure, corneal endothelial cell density, corneal endothelial cell loss rate and complications were observed before operation and 1, 3, 6 and 12mo after operation.RESULTS: The mean intraocular pressure before operation was 43.41±5.33 mmHg. The mean intraocular pressure at 1, 3, 6 and 12mo after operation were 12.11±3.26, 13.82±4.12, 13.54±3.83 and 15.80±4.35 mmHg respectively. The mean intraocular pressure at each follow-up point after operation was significantly lower than that before operation(F=203.40, P<0.01). The corneal endothelial cell density at each time point after surgery was lower than that before surgery(F=6.18, P<0.01), but there were no significantly differences in the density and loss rate of corneal endothelial cell at 1, 3, 6 and 12mo after surgery(P>0.05). Furthermore, the overall surgery success rate was 83%.CONCLUSIONS: Ahmed glaucoma valve implanting through the ciliary sulcus is safe and effective in the treatment of IOL glaucoma, and the damage to corneal endothelial cells is mild. The corneal endothelial cells density doesn't decrease with time after surgery.
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OBJECTIVE To investigate the effect and potential mechanism of sodium ferulate （SF） on corneal endothelial dysfunction and corneal endothelial cell （CEC） injury. METHODS The male New Zealand rabbits were divided into control group， benzalkonium chloride （BAK） group and BAK+SF group， with 6 rabbits in each group. Except for control group， the other groups were given BAK into the anterior chamber to induce bullous keratopathy model， and BAK+SF group then given SF solution 200 mg/kg intraperitoneally the next day after surgery， twice a day， for consecutive 14 d. The transparency of corneal and edema of corneal stroma in each group of rabbits （before and on the 1st， 7th， and 14th day after surgery） were observed， and the corneal thickness （14th day after surgery） and intraocular pressure （1st to 14th day after surgery） were measured. On the 14th day after operation， the corneal endothelial structure was evaluated and the expressions of functionally related proteins [phalloidin， zonula occludens-1 （ZO-1）， Na+/K+-ATPase， Ki67] were detected. On the 14th day after surgery， the corneal tissue was collected in BAK group， the primary rabbit CECs were isolated and cultured， and they were divided into blank group and SF groups with different mass concentrations. The cell viabilities after being cultured for different time， and the protein expressions of Ras homologous gene family A （RhoA）， bone morphogenetic protein receptor 1A （BMPR1A） and BMRP2 were determined in each group. RESULTS Compared with BAK group， the transparency of corneal and edema of corneal stroma were gradually improved， and the corneal thickness was significantly decreased in BAK+SF group （P＜0.05）. The rabbit CECs in BAK+SF group were only damaged to zone B and showed a normal hexagonal endothelial cells structure. The protein expressions of phalloidin， ZO-1， Na+/K+-ATPase and Ki67 in BAK+SF group were significantly increased （P＜0.05）. When SF concentration was lower than and equal to 200 mg/L， it could promote the proliferation of rabbit CEC， in concentration manner （P＜0.05） and time-dependent trend. SF at concentrations of 50， 100， and 200 mg/L could up-regulate the protein expressions of RhoA， BMPR1A and BMPR2 in concentration-dependent manner （P＜0.05）. CONCLUSIONS SF can improve the transparency of corneal and edema of corneal stroma in bullous keratopathy model rabbits， reduce corneal thickness， maintain the integrity of corneal endothelium structure， and promote the recovery of corneal endothelial function； this compound can promote the proliferation of CEC， the mechanism of which may be related to the activation of RhoA-ROCK-BMP pathway.
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AIM: To investigate the clinical efficacy of femtosecond laser-assisted phacoemulsification combined with goniosynechialysis in the treatment of acute angle-closure glaucoma complicated with cataract.METHODS: A total of 53 patients(60 eyes)with primary acute angle closure glaucoma complicated with cataract admitted to our hospital from April 2020 to February 2021 were selected. They were divided into two groups according to the surgical method, with 28 cases(30 eyes)who were treated with femtosecond laser-assisted phacoemulsification combined with goniosynechialysis in group A, and 25 cases(30 eyes)who were treated with traditional cataract phacoemulsification combined with goniosynechialysis in group B. The effective phacoemulsification time(EPT)and cumulative dissipated energy(CDE)during surgery in two groups were recorded. Patients were followed up to 3mo after surgery, and the intraocular pressure, anterior chamber depth(ACD), best corrected visual acuity, corneal endothelial cell loss rate(ECL)and surgical complications were observed in both groups.RESULTS: The postoperative intraocular pressure was significantly decreased and ACD was significantly increased(all P<0.05), and there was no difference between the two groups(all P>0.05). The postoperative best corrected visual acuity of the two groups was significantly better than that before surgery(P<0.05), and group A was significantly better than group B at 1d after surgery(P<0.05). The EPT, CDE, ECL and incidence of complications(7% vs. 27%)in group A were significantly lower than those in group B(all P<0.05).CONCLUSION: Femtosecond laser-assisted cataract phacoemulsification combined with goniosynechialysis in the treatment of primary acute angle-closure glaucoma combined with cataract has a significant therapeutic effect, which can effectively improve surgical safety, reduce the rate of corneal endothelial cell loss, and have fewer complications.
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AIM:To compare the curative effect of different surgical methods combined with Toric intraocular lens(IOL)implantation on age-related hard nuclear cataract.METHODS:According to retrospective study, 104 patients(104 eyes)with age-related hard nuclear cataract confirmed in the hospital between January 2020 and December 2021 were enrolled. They were divided into phacoemulsification group(52 eyes, phacoemulsification combined with Toric IOL implantation)and small-incision group(52 eyes, small-incision split nuclear technique in horizontal space combined with Toric IOL implantation)according to different surgical methods. The best corrected distance visual acuity(BCDVA), corneal astigmatism, number of corneal endothelial cells, proportion of normal hexagonal cells, tear film function and complications were compared between the two groups.RESULTS:There was no significant difference in BCDVA(LogMAR)between the two groups before and at 3mo after surgery(all P>0.05), while BCDVA(LogMAR)was better in small-incision group than phacoemulsification group at 1wk after surgery(0.15±0.04 vs. 0.20±0.05, P<0.001). The corneal astigmatism of the patients in both groups was lower at 1wk and 3mo after surgery than that before surgery, and it was lower at 3mo than 1wk after surgery(all P<0.05), while there was no significant difference in corneal astigmatism between the two groups before and after surgery(all P>0.05). At 1wk and 3mo after surgery, number of corneal endothelial cells in small-incision group was more than that in phacoemulsification group(1wk after surgery: 2363.8±315.3 vs. 2231.4±326.4 cells/mm2, P<0.05; 3mo after surgery: 2414.6±245.7 vs. 2322.9±221.0 cells/mm2, P<0.05). Before and at 1wk after surgery, there was no significant difference in the proportion of normal hexagonal cells between the two groups(all P>0.05). At 3mo after surgery, proportion of normal hexagonal cells in small-incision group was higher than that in phacoemulsification group(21.77%±1.91% vs. 20.59%±1.65%, P<0.001). Before and at 3mo after surgery, there was no difference in break up time(BUT)or ocular surface disease index(OSDI)score between the two groups(P>0.05). At 1wk after surgery, BUT in small-incision group was longer than that in phacoemulsification group(6.8±0.8 vs. 5.9±1.0s, P<0.001)and OSDI score was lower than that in phacoemulsification group(17.62±5.47 vs. 20.34±6.18 points, P<0.05). The incidence of postoperative complications in small-incision group was lower than that in phacoemulsification group(3.9% vs. 17.3%, P<0.05).CONCLUSION: Small-incision split nuclear technique in horizontal space combined with Toric IOL implantation can significantly improve visual acuity and astigmatism in patients with age-related cataract, with slight damage to corneal endothelium and tear film function.
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AIM: To investigate the influence of the duration of orthokeratology lens cessation on patients' refractive status and corneal endothelial cells.METHODS: Adolescent myopia patients who wore orthokeratology lens from July 2019 to July 2020 and recently planned to stop wearing the lens were divided into mild group and severe group according to spherical equivalent. Refractive status, corneal morphology, corneal endothelial cells, and visual quality were measured at cessation and 1, 2 and 3mo after cessation.RESULTS: The corneal flat K values, steep K values and mean K values in the two groups were lower at cessation than those before wearing lenses. These values returned to the level before wearing lenses at 2mo after cessation(P&#x003E;0.05). The corneal astigmatism, surface regularity index and surface asymmetry index in each group showed no statistically significant difference before wearing lenses and at 1, 2 and 3mo after cessation(P&#x003E;0.05). There was no significant change in corneal endothelial cell density of the two groups at 1, 2 and 3mo after cessation compared with those before wearing lenses(P&#x003E;0.05). The proportion of hexagonal cells in the two groups was lower at cessation than that before wearing lenses, and it returned to the level before wearing lenses at 1mo after cessation(P&#x003E;0.05).CONCLUSION: Corneal morphology and corneal endothelial cells can be restored to the level before wearing orthokeratology lens at 3mo after cessation.
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ABSTRACT Purpose: To investigate the reduction in corneal endothelial cell density associated with gonioscopy-assisted transluminal trabeculotomy (GATT) in a short-term follow-up period. Methods: A retrospective analysis of the medical charts of patients with open-angle glaucoma who underwent gonioscopy-assisted transluminal trabeculotomy isolated or combined with phacoemulsification (phaco-gonioscopy-assisted transluminal trabeculotomy) was conducted. Patients who underwent phacoemulsification alone were included as controls. The endothelial cell density data (assessed using a specular microscope) before and at the first month after operation were collected and then compared. Results: Sixty-two eyes previously treated with gonioscopy-assisted transluminal trabeculotomy (gonioscopy-assisted transluminal trabeculotomy, n=39 eyes; phaco-gonioscopy-assisted transluminal trabeculotomy, n=23 eyes) fulfilled the inclusion criteria. The mean age of the study patients was 61.3 ± 18.4 years in the stand-alone gonioscopyassisted transluminal trabeculotomy group and 60.4 ± 11.9 in phaco-gonioscopy-assisted transluminal trabeculotomy group. Men comprised 66.6% of the patients in the isolated gonioscopyassisted transluminal trabeculotomy group and 56.5% of those in the phaco-gonioscopy-assisted transluminal trabeculotomy group. The mean visual field defects (mean deviation index) were -13.9 ± 9.2 and -10.3 ± 7.7 dB in the isolated gonioscopy-assisted and phaco-gonioscopy-assisted transluminal trabeculotomy groups, respectively. The patients in the former group presented a mean endothelial cell density reduction of 28.8 cells/mm² (1.31%; p=0.467). In the latter group, the mean endothelial cell density loss was 89.4 cells/mm² (4.36%; p=0.028). The control eyes (23 patients) presented a mean endothelial cell density change of 114.1 ± 159.8 cells/mm² (4.41%; p=0.505). The endothelial cell density reduction in the phaco-gonioscopy-assisted transluminal trabeculotomy group was not significantly different from that in the controls (p=0.81). Conclusions: Gonioscopy-assisted transluminal trabeculotomy appears to be a safe procedure for the corneal endothelial cell layer when performed either isolated or combined with cataract extraction in a short-term follow-up period.
RESUMO Objetivo: Investigar a redução na densidade celular endotelial corneana associada à trabeculotomia transluminal assistida por gonioscopia (GATT) em curto prazo. Métodos: Análise retrospectiva de prontuários médicos de pacientes com glaucoma de ângulo aberto que foram submetidos à trabeculotomia transluminal assistida por gonioscopia isolada ou combinada com facoemulsificação. Pacientes que foram submetidos à facoemulsificação isolada foram incluídos como controles. Dados da densidade celular endotelial corneana (avaliada através de microscópio especular) pré-operatória e ao primeiro mês pós-operatório foram coletados e comparados. Resultados: Sessenta e dois olhos que foram submetidos à trabeculotomia transluminal assistida por gonioscopia (trabeculotomia transluminal assistida por gonioscopia=39 olhos; faco com trabeculotomia transluminal assistida por gonioscopia=23 olhos) passaram pelos critérios de inclusão. A idade média dos pacientes estudados era 61,3 ± 18,4 anos no grupo trabeculotomia transluminal assistida por gonioscopia isolada e 60,4 ± 11,9 anos no grupo faco com trabeculotomia transluminal assistida por gonioscopia. Homens eram 66,6% do grupo trabeculotomia transluminal assistida por gonioscopia isolada e 56,5% do grupo faco com trabeculotomia transluminal assistida por gonioscopia. O defeito perimétrico médio (Mean Deviation) era -13,9 ± 9,2 dB e -10,3 ± 7,7 dB nos grupos trabeculotomia transluminal assistida por gonioscopia isolada e faco com trabeculotomia transluminal assistida por gonioscopia respectivamente. O grupo que fora submetido à trabeculotomia transluminal assistida por gonioscopia isolada apresentou redução média da densidade celular endotelial corneana de 28,8 células/mm² (1,31%; p=0,467). No grupo faco com trabeculotomia transluminal assistida por gonioscopia, a redução média da densidade celular endotelial corneana foi de 89,4 células/mm² (4,36%; p=0,028). Olhos controle (23 olhos) apresentaram redução média da densidade celular endotelial corneana de 114,1 ± 159,8 células/mm² (4,41%; p=0,505). A redução na densidade celular endotelial corneana no grupo faco com trabeculotomia transluminal assistida por gonioscopia não foi significativamente diferente do grupo controle (p=0,81). Conclusões: A trabeculotomia transluminal assistida por gonioscopia parece ser segura para a camada endotelial corneana em um curto prazo quando realizada de forma isolada ou combinada com cirurgia de catarata.
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Purpose: Comparison of three ultrasound (US) frequencies for phacoemulsification of hard cataracts to determine a frequency that makes phacoemulsification more efficacious and safer. Methods: A randomized controlled trial was undertaken at a medical college and hospital. In total, 207 patients with grade 5.6� 6.9 (LOCS III) senile cataract were randomized into three groups. Group I underwent phacoemulsification with 28?kHz frequency, group II with 42?kHz frequency, and group III with 53?kHz frequency. The effective phacoemulsification time (EPT) and estimated fluid usage (EFU) were compared intraoperatively. The endothelial cell parameters were analyzed for 6 months. Results: The groups were matched for age (P = 0.467), gender (P = 0.497), nuclear grade (P = 0.321), and anterior chamber depth (P = 0.635). The EPT and EFU were significantly lower in group III, compared to group II and group I, with P < 0.0001 and P < 0.0001, respectively. Postoperatively, the endothelial cell density (ECD) was significantly higher in group III at 1 month (P < 0.0001), 3 months (P < 0.0001), and 6 months (P < 0.0001). The percentages of ECD loss were also significantly lower in group III; the difference was statistically significant (P < 0.0001) up to 6 months postoperatively. Conclusion: Higher frequency ultrasound was associated with a lower EPT and EFU as well as better endothelial preservation than lower frequencies in hard cataracts
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Background:Corneal endothelial cells are susceptible to mechanical trauma from ultrasound energy during phacoemulsification. Several studies have reported various results of phacoemulsification effect on corneal endothelial cells between diabetic and non-diabetic patients due to stressful events. Present study was aimed to evaluate corneal endothelial density, hexagonality and Central Corneal Thickness (CCT) changes between diabetic and non-diabetic patients at early postoperative period and 1 month after phacoemulsification.Material And Methods:Specular microscopy examinations prior to phacoemulsification and at early postoperative period and 1 months after phacoemulsification were performed on diabetic and non-diabetic groups in grade 2 and grade 3 nuclear sclerosis. Laterthe changes in endothelial density, the percentage of hexagonality, and Central corneal thickness were evaluated.Result:Mean age of 120 study sample was 58.45 years (standard deviation –8.498 years), with the highest 74 years and lowest 43 years. Therewere 53 (44%) females and 67 (56%) males in the study. 42 (35%) samples were from 51-60 years age group followed by 37 (30.83%) subjects in 61-70 years age group. Mean corneal endothelial cell density decreases after cataract surgery in comparison with pre-operative density among study samples. Mean pre-operative corneal endothelial cell density was lower in diabetics in comparison with non-diabetics, and the difference was statistically significant. Cell density count decreases after cataract surgery inboth groups with significant difference between two groups. Mean corneal endothelial cell morphology (hexagonal cell percentage) decreases after cataract surgery in comparison with pre-operative density among study sample s. Central corneal thickness increases in early postoperative period followed by normalisation at day 30.Conclusion:Diabetic group showed greater hexagonality decrease compared to non-diabetic group at 1 month after phacoemulsification. It is suggested that diabetic corneal endothelium requires additional care and protective measures during cataract surgery to minimize surgical trauma. There were no statistically significant differences in the endothelial loss and Central corneal thickness changes between the diabetic and non-diabetic group at 1 month follow up after phacoemulsification.
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Objective:To explore the long-term influence of donor central graft thickness (CGT) and donor graft size on corneal endothelial cell density (ECD) after Descemet stripping automated endothelial keratoplasty (DSAEK).Methods:An observational case series study was conducted.One hundred and forty-four eyes of 134 patients who underwent DSAEK in Peking University Third Hospital from January 2013 to December 2017 with at least 24-month follow-up were enrolled.Preoperative donor ECD was evaluated by specular microscopy, and ECD was determined by in vivo confocal microscopy at 1, 3, 6, 12, and 24 months postoperatively.Donor CGT was measured by anterior segment optical coherence tomography.According to the 3-month postoperative donor CGT, the subjects were divided into thinner graft group (45 eyes with CGT<100 μm), medium-thick graft group (66 eyes with CGT≥100-<150 μm) and thicker graft group (33 eyes with CGT≥150 μm). According to the donor trephination size, the subjects were divided into smaller graft group (31 eyes with trephination size≥7-<8 mm) and larger graft group (113 eyes with trephination size≥8-<9 mm). The changes of the donor CGT and corneal endothelial cell loss rate were compared at different time points after surgery.The relationships between 24-month postoperative ECD and donor ECD, donor graft size and donor CGT were analyzed.This study adhered to the Declaration of Helsinki.The study protocol was approved by the Ethics Committee of Peking University Third Hospital (No.IRB00006761-2008025). Written informed consent was obtained from each subject prior to any medical examination. Results:The donor CGT was 129.0 (90.8, 160.8), 115.5 (93.0, 146.0), 115.5 (89.0, 151.0), 112.5 (94.3, 146.8) and 114.0 (89.0, 144.5) μm at 1, 3, 6, 12 and 24 months after surgery, showing a statistically significant difference ( H=37.369, P<0.001). There was a statistically significant difference between 1-month and 3-month postoperative CGT ( P<0.001). There was no statistically significant difference in the endothelial cell loss rate among the three different donor CGT groups and between the two different donor graft size groups at any postoperative time points (all at P>0.05). Spearman correlation analysis showed that the 24-month postoperative ECD was strongly positively correlated with the preoperative donor ECD( rs=0.783, P<0.001), which was not associated with donor graft size and donor CGT ( rs=0.141, P=0.093; rs=-0.044, P=0.600). Conclusions:Larger postoperative ECD is correlated with larger preoperative ECD of donor graft.Lower long-term corneal endothelial cell loss rate after DSAEK is associated with thinner and larger diameter of donor graft.
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ABSTRACT Purpose: The aim of this study was to compare corneal structure and endothelial morphological changes after uneventful phacoemulsification cataract surgery between type 2 diabetic and nondiabetic patients and to determine the preoperative and intraoperative factors that may predict greater endothelial cell density loss. Methods: Forty-five diabetic patients (45 eyes) and 43 controls (43 eyes) with age-related cataract were enrolled in this prospective observational study. Corneal (thickness and volume) and anterior segment parameters were measured by Scheimpflug tomography; endothelial cell density and morphology (coefficient of variation of cell size, hexagonal cells) were recorded using noncontact specular microscopy. Patients were evaluated preoperatively and at one and six months after surgery. Univariate and multivariate linear regression analyses were performed to evaluate the relationship between demographic, clinical, ocular, and intraoperative parameters and postoperative endothelial cell density changes at six months. Results: Significant postoperative endothelial cell loss occurred one month after surgery in both groups (p<0.001), which remained stable until month 6; there were no differences between patients with and without diabetes mellitus at any time point. The mean postoperative central corneal thickness at one and six months did not change significantly from the mean preoperative value in either group (p>0.05). Multivariate linear regression analysis showed that older age (p=0.042) and higher cataract grades (p=0.001) were significantly associated with greater endothelial cell density reduction at six-month follow-up. Conclusion: This study showed that older age and denser cataracts might be associated with greater endothelial cell density reduction after cataract surgery. Other factors, such as diabetes mellitus and preoperative anterior segment parameters, did not influence postoperative changes in endothelial cell density.
RESUMO Objetivo: Comparar a estrutura da córnea e as alterações morfológicas endoteliais após cirurgia de catarata por facoemulsificação sem intercorrências entre pacientes com diabetes mellitus tipo 2 e não diabéticos; e determinar quais fatores pré e intra-operatórios relacionados com a maior redução da densidade celular endotelial. Métodos: Quarenta e cinco diabéticos (45 olhos) e 43 (43 olhos) controlos com catarata relacionada à idade foram incluídos neste estudo observacional prospectivo. Os parâmetros da córnea (espessura e volume) e do segmento anterior foram medidos pela tomografia Scheimpflug; a densidade e morfologia celular endotelial (coeficiente de variação do tamanho das células, células hexagonais) foram registrados usando microscopia especular não contato. Os pacientes foram avaliados no pré-operatório, 1 e 6 meses após a cirurgia. Foi realizada uma análise de regressão linear uni e multivariada para avaliar a relação entre os parâmetros demográficos, clínicos, oculares e intra-operatórios com a redução da densidade celular endotelial aos 6 meses. Resultados: Nos dois grupos houve uma perda significativa de células endoteliais ao 1º mês pós-operatório (p<0,001), que permaneceu estável até ao 6º mês; sem diferenças estatisticas entre os grupos diabetes mellitus e não diabetes mellitus em qualquer avaliação. A espessura média da córnea no pós-operatório central aos 1 e 6 meses não mudou significativamente em relação ao valor médio pré-operatório nos dois grupos (p>0.05). A análise de regressão multivariada linear mostrou que a idade avançada (p=0.042) e os graus mais elevados de catarata (p=0.001) foram significativamente associados à maior redução densidade celular endotelial aos 6 meses de seguimento. Conclusão: Este estudo mostrou que a idade avançada e as cataratas mais densas podem predispor a uma maior redução densidade celular endotelial após a cirurgia de catarata. Outros fatores, como diabetes mellitus e parâmetros pré-operatórios do segmento anterior, não influenciaram significativamente as alterações pós-operatórias da densidade celular endotelial.
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@#AIM: To observe the safety and effect of cataract extraction combined with intraocular lens(IOL)implantation surgery in patients with abnormal morphology of corneal endothelium. <p>METHODS: We collected 72(90 eyes)age related cataract patients with abnormal morphology of corneal endothelium and 120(158 eyes)patients with normal morphology of corneal endothelium from January 2018 to January 2020 in our hospital. All of them measured corneal endothelial cell density(CD)>2 000cell/mm<sup>2</sup> and underwent phacoemulsification combined with IOL implantation. CD, coefficient of variation(CV), frequency of hexagonal cells(HEX), central corneal thickness(CT)were recorded at 1wk, 1, 3mo postoperatively and compared in each group.<p>RESULTS:There were significant differences in endothelial CD, CV, HEX and CT between the two groups 1wk and 1mo postoperative, while there were significant differences in CD and HEX between the two groups after 3mo, but there were no significant differences in CV and CT.<p>CONCLUSION: Endothelial damage after phacoemulsification in abnormal morphology of corneal endothelium group is comparable to that in control group, and we should pay more attention to the examination of corneal endothelium, especially the corneal endothelial cells morphology before operation and protect it during operation.
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@#AIM:To evaluate the effect of the vault on corneal endothelial cells after implantation of central hole implantable lens(ICL)V4c without viscoelastic microincision.<p>METHODS: Prospective non-randomized controlled study. A total of 70 patients(137 eyes)with myopia who underwent ICL V4c implantation in our hospital from November 2017 to February 2018 were divided into low vault group(100μm<vault≤250μm, 37 eyes), medium vault group(250μm<vault≤750μm, 69 eyes)and high vault group(750μm<vault≤900μm, 31 eyes)according to the size of postoperative vault. After 1a of follow-up, the changes of corneal endothelial cell count and anterior chamber parameters were observed.<p>RESULTS:At 1wk after operation, the anterior chamber depth, anterior chamber volume and anterior chamber angle of the three groups were all decreased compared with those before operation(<i>P</i><0.05). There was no significant difference in corneal endothelial cell count among the three groups at different time points before and after surgery. The loss rate of corneal endothelial cells in the low vault group at 1wk, 3mo and 1a after surgery were about 1.2%, 1.5% and 1.7%, respectively. The loss rate of corneal endothelial cells in the middle vault group were about 0.5%, 0.7% and 1.0%, respectively. The loss rate of corneal endothelial cells in the high vault group were about 1.1%, 1.3% and 1.4%, respectively.<p>CONCLUSION:The vault in early period after ICL V4c implantation without viscoelastic microincision had no significant effect on corneal endothelial cells.
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@#AIM: To investigate the changes of corneal endothelial cells and ocular surface after phacoemulsification for age-related cataract(ARC)patients with diabetes mellitus. <p>METHODS: Retrospective case study. A total of 190 cataract patients with diabetes mellitus who received phacoemulsification combined with IOL implantation in 190 eyes admitted to our hospital from January 2017 to January 2019 were selected. In addition, 230 ARC patients without diabetes who underwent phacoemulsification and intraocular lens implantation at the same time were selected as the control group. Ocular surface disease index(OSDI)score, tear film rupture time(BUT), basal tear secretion test(S I t), corneal endothelial cell density and coefficient of variation were compared between the two groups.<p>RESULTS: There was no significant difference in preoperative OSDI score, BUT, S I t, corneal endothelial cell density and coefficient of variation between the two groups(<i>P</i>>0.05). In the observation group, OSDI scores were significantly increased 1wk, 1mo and 3mo after surgery compared with those before surgery, with statistically significant differences(all <i>P</i><0.01). The OSDI scores of patients in the control group increased significantly one week and one month after the operation compared with those before the operation, with statistically significant differences(all <i>P</i><0.01). The OSDI scores in the observation group at each time point after the operation were higher than those in the control group, with statistically significant differences(all <i>P</i><0.05). One week after surgery, 1mo after surgery, BUT and S I t in the two groups decreased significantly compared with that before surgery(<i>P</i><0.05), and the difference was not statistically significant compared with that before surgery 3mo after surgery. In addition, compared with BUT between the two groups, the observation group had a lower tear film stabilization time and a more significant decrease(<i>P</i><0.05). The corneal endothelial cell density in the two groups decreased significantly 1wk, 1mo and 3mo after surgery compared with that before surgery(<i>P</i><0.05). The variation coefficient of corneal endothelial cells in the two groups was statistically significant 1wk after the operation and 1mo after the operation compared with that before the treatment(<i>P</i><0.05). The variation coefficient of corneal endothelial cells in the observation group was more significant than that in the control group(<i>P</i><0.05).<p>CONCLUSION: Cataract patients with diabetes surgery tolerance is low, the corneal endothelial cell density and the central corneal thickness and corneal appears before tear secretion with stability and foundation treatment have significant changes, and its characteristic is cataract patients without diabetes more apparent, clinical intraoperative and postoperative corneal endothelial protection should be strengthened, and the surface of the eye protection ability of the organization.
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Objective:To study the therapeutic effect of 1.8 mm micro incision prechop phacoemulsification (PE) in patients with nuclear cataract.Methods:The clinical data of 120 patients with nuclear cataract from June to December 2018 in Ningbo Medical Center Lihuili Hospital were retrospectively analyzed. Among them, 60 patients were treated with 1.8 mm micro incision prechop PE (prechop group), and 60 patients were treated with 1.8 mm micro incision PE (non-prechop group). The effective ultrasonic time and ultrasonic energy were recorded. The changes of optimum corrected vision, astigmatism degree and related indexes of corneal endothelial cells 1 d before operation and 1 d, 1 week, 1 month, 3 months, 6 months, 12 months after operation were compared between 2 groups.Results:The effective ultrasonic time and ultrasonic energy in prechop group were significantly lower than those in non-prechop group: (44.04 ± 8.93) s vs. (59.03 ± 9.98) s and (11.29 ± 1.08)% vs. (14.15 ± 1.16)%, and there were statistical differences ( t = 4.139 and 5.289, <0.05). No serious complications occurred in both groups. There was no statistical difference in optimum corrected vision 1d before operation and 1 d after operation between 2 groups ( P>0.05); the optimum corrected vision 1 week, 1 month, 3 months, 6 months, and 12 months after operation in prechop group was significantly better than that in non-prechop group, and there was statistical difference ( P<0.05). There was no statistical difference in astigmatism degree before and after operation ( P>0.05). The density of corneal endothelial cells and the proportion of hexagonal cells after operation in prechop group were significantly higher than those in non-prechop group, the area of corneal endothelial cells and variation coefficient were significantly lower than those in non-prechop group, and there were statistical differences ( P<0.05). Conclusions:The 1.8 mm micro incision prechop PE to treat nuclear cataract can effectively reduce astigmatism degree after operation and damage corneal endothelial cells in lower degree. And it is better to patients′ postoperative visual recovery.
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The main attributes of cornea which makes it optically important is its ability to maintain its dehydrated state. This corneal dehydration can be achieved and maintained by various factors among which corneal endothelial cell count and morphology play a significant role. Corneal attributes considered in this study i.e. the corneal endothelial cell count and central corneal thickness are extremely variable, and changes are seen even with smaller changes in anterior segment or overall structural changes in eyes. We wanted to compare central corneal thickness in emmetropia and axial myopia and compare corneal endothelial cell count in emmetropia and axial myopia. METHODSThe sample size was decided taking into consideration various prevalence studies. The patients were consecutively recruited for the study considering the inclusion and exclusion criteria. The subjects were divided into two groups emmetropia and axial myopia and were differentiated on the basis of the axial lengths. Specular microscopy was performed for the subjects and corneal endothelial cell count, morphology and central corneal thickness were measured, and comparative study was performed. RESULTSThis study of 80 eyes shows us that the difference between mean the corneal endothelial cell count between emmetrope (2812.80 cells / mm2) and axial myopes (2653 cells / mm2) is statistically significant where p was < 0.05 while the mean central corneal thickness measurements didn’t show statistically significant change between emmetrope (490.05 microns) and axial myope. (489.37 microns). CONCLUSIONSAxial length has an indirect correlation with the corneal endothelial cell count which is statistically significant. While significant correlation between the central corneal thickness and axial length cannot be established in this study.
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@#AIM:To systematically evaluate the effect of trypan blue capsule staining on corneal endothelial cells in phacoemulsification. <p>METHODS: RCTs on the use of trypan blue for capsular staining in phacoemulsification were retrieved from China Knowledge Network(CNKI), Wanfang Database, Weipu Database, SinoMed, PubMed, SpringerLink, Clinicalkey, Medline, Cochrane Library, Web of Science, OVID, Embase. The search time was from the establishment of the databases to April 2019.The Meta-analysis of the included literature was made by Revman 5.3 and R 3.7.<p>RESULTS: Eight trials included 378 eyes were selected. Meta-analysis showed that the number of corneal endothelial cell loss between 0.02%, 0.06% or 0.1% trypan blue capsule staining group(193 eyes)and non-stained or placebo staining group(185 eyes)changed without statistical significance \〖Within 1mo after operation(<i>WMD</i>=-10.47, 95% <i>CI</i>=-26.44-5.61, <i>P</i>=0.20); 1mo after operation(<i>WMD</i>=-60.72, 95% <i>CI</i>=-170.92-49.49, <i>P</i>=0.28)\〗. The percentage of corneal endothelial hexagonal cell loss at 1mo after operation changed without statistical significance(<i>WMD</i>=0.50, 95% <i>CI</i>=-2.09-3.09, <i>P</i>=0.71). The central corneal thickness(CCT)at 1mo after operation changed without statistical significance(<i>WMD</i>=3.10, 95% <i>CI</i>=-5.77-11.98, <i>P</i>=0.49). The coefficient of variation(CV)changed without statistical significance(<i>WMD</i>=-1.00, 95% <i>CI</i>=-2.86-0.86, <i>P</i>=0.29).<p>CONCLUSION: 0.02%, 0.06% or 0.1% trypan blue capsule staining in phacoemulsification have no significant effect on the number and function of corneal endothelial cells.
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@#AIM: To investigate the curative effect of 3.0mm incision phacoemulsification and 1.8mm coaxial micro-incision phacoemulsification and the influence on corneal endothelial cells.<p>METHODS: A total of 78 patients(78 eyes)with age-related cataract who were hospitalized in the hospital from December 2016 to December 2018 were selected as subjects. They were divided into the standard incision group and the micro-incision group with 39 cases(39 eyes)in each group. Patients in the standard incision group were treated with 3.0mm standard incision phacoemulsification and intraocular lens implantation, while the patients in the micro-incision group were treated with 1.8mm coaxial micro-incision phacoemulsification and intraocular lens implantation. The surgical outcome and corneal endothelial cell parameters were compared between the two groups. <p>RESULTS: The phacoemulsification time of the standard incision group and the micro-incision group were(7.05±0.98)s and(7.22±0.96)s, respectively. The phacoemulsification energy was(17.01±1.89)% and(16.89±1.53)%, respectively(<i>P</i>>0.05). The LogMAR of naked eyes of both groups decreased significantly at 1d, 1wk and 1mo after surgery(<i>P</i><0.001), while the degree of astigmatism increased(<i>P</i><0.001). The naked vision and astigmatism of the micro-incision group were better than those of the standard incision group at 1d and 1wk after surgery(<i>P</i><0.05). Endothelial cell density was significantly decreased at 1d, 1wk and 1mo after surgery(<i>P</i><0.05). The coefficient of variation of corneal endothelial cells and the thickness of central cornea increased. There was no significant difference between the standard incision group and the micro-incision group at each time poilt(<i>P</i>>0.05). There were no severe complications in either group. There was one patient with transient high intraocular pressure in the standard incision group, and the intraocular pressure returned to normal after drug treatment.<p>CONCLUSION: Both coaxial micro-incision phacoemulsification and standard small incision surgery have certain effects on the morphology and function of endothelial cells. Besides, there is no significant difference between them. However, coaxial micro-incision phacoemulsification can minimize the surgical incision and reduce the degree of surgically induced astigmatism, and patients can recover quickly after surgery. It is a relatively safer surgical procedure.
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@#AIM: To explore the protective effect of dexamethasone combined with hypertonic solution on corneal endothelial cells of rabbit eyes. <p>METHODS: We made four groups of rabbits for different treatments with dexamethasone and hypertonic solution. All groups were treated with low-permeability solution for 10min to maintain anterior chamber perfusion. Group A was treated with 0.2mL dexamethasone subconjunctival injection, and hypertonic glucose eye drop immediately after surgery. Group B(control group)was subjected to 0.2mL of 0.9% saline subconjunctival injection, and balanced salt solution eye drop immediately after surgery. In group C, 0.2mL dexamethasone subconjunctival injection, and hypertonic glucose eye drop were given on the second day of surgery and in group D(control group), 0.2mL of 0.9% saline through subconjunctival injection and balanced salt solution eye drop were given on the second day of the surgery. The edema degree of cornea was observed with slit lamp before the operation and on the 1, 3, 5 and 7d after operation. The cornea were also examined by anterior segment OCT, and the corneal thickness was measured by A-scan ultrasonography.<p>RESULTS: In group A, during the entire experimental observation period, the cornea had no edema or only mild edema, the thickness of the central cornea hardly increased, and the number of corneal endothelial cells did not change significantly. There was no significant difference compared with(control group B)before modeling(<i>P</i>>0.05). In groups B, C, and D, corneal edema and corneal thickness increased after the rabbit eyes were modeled. There was a significant difference compared with group A(<i>P</i><0.05). The number of corneal endothelial cells in the rabbit eyes of groups B and D could not be measured during the observation period due to corneal edema. The number of corneal endothelial cells can be measured in group C up to the 7d after modeling. The number of corneal endothelial cells in group C was significantly reduced as compared with group A(<i>P</i><0.05), which before modeling and the 7d after modeling.<p>CONCLUSION: Dexamethasone combined with hypertonic glucose solution has a good protective effect on rabbit corneal endothelial cells. And early application can effectively prevent rabbit corneal edema and this method can also prevent the progression of corneal endothelial decompensation.
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@#Iridocorneal endothelial(ICE)syndrome presents a group of ocular pathologies mostly characterized by corneal endothelial abnormalities and iris atrophy. Iridocorneal endothelial syndrome is typically a unilateral and generally not involving genetic condition, frequently affecting women in early to middle adulthood. There is no treatment for absence of symptoms in early stages. When complicated with corneal edema and secondary glaucoma, treatment is mainly symptomatic. In this group of diseases, there are many similarities and some differences in their pathogenesis, clinical manifestations and treatment. So far no universal information on these features has been published. Recent clinical studies on iridocorneal endothelial syndrome are reviewed in this paper.