Modificaciones del segmento anterior ocular tras extracción del cristalino versus iridotomía periférica láser en el cierre angular primario / Modifications of the ocular anterior segment after lens extraction versus peripheral laser iridotomy in primary angle closure

RESUMEN Introducción: el tratamiento inicial para el cierre angular primario está dirigido a modificar el segmento anterior ocular y a estabilizar la enfermedad. Objetivo: evaluar si existen diferencias entre los pacientes tratados con facoemulsificación o iridotomía periférica láser, en cuanto a mejoría de los parámetros anatómicos del segmento anterior ocular. Materiales y métodos: se realizó un estudio cuasi experimental con un grupo de control histórico en la provincia Pinar del Río, entre enero de 2011 y enero de 2020. El mismo incluyó 196 ojos de 144 pacientes con cierre angular primario, tratados con facoemulsificación o iridotomía periférica láser. El análisis estadístico se realizó a través del programa SPSS. Resultados: en el preoperatorio no hubo diferencias significativas para la amplitud de la cámara anterior. En el postoperatorio sí existieron diferencias muy significativas (p < 0,001) entre los dos procedimientos quirúrgicos para ambos ojos. En la amplitud angular también existieron diferencias muy significativas (p < 0,001) entre el preoperatorio y el postoperatorio de ambos grupos. La presencia de sinequias anteriores periféricas fue escasa, sin diferencias entre los valores basales, y a los dos meses en ambos ojos para cada grupo. La evidencia de cierre angular, al final del período, entre el grupo de facoemulsificación y el de iridotomía, fue de 4,9 % vs. 23,2 % (p = 0,029) en el ojo derecho, y de 2,7 % vs. 29,0 % (p = 0,003) en el izquierdo. Conclusiones: tanto la extracción del cristalino como la iridotomía periférica láser mejoran los parámetros anatómicos del segmento anterior, aunque los resultados son superiores en ojos tratados con facoemulsificación.

ABSTRACT Introduction: initial treatment for the primary angle closure is aimed to modify the anterior ocular segment and to stabilize the disease. Objective: to assess if there are differences between patients treated with phacoemulsification or peripheral laser iridotomy, in terms of improvement of the anatomical parameters of the anterior ocular segment. Materials and methods: a quasi-experimental study was led with a historic control group in the province of Pinar del Rio, between January 2011 and January 2020. It included 196 eyes of 144 patients with primary angular closure, treated with phacoemulsification or laser peripheral iridotomy. The statistical analysis was carried out using SPSS program. Results: in the preoperative period there were not significant differences for the amplitude of the anterior chamber. In the postoperative there were very significant differences (p < 0.001) between the two surgical procedures for both ayes. In angular amplitude there were also very significant differences (p < 0.001) between preoperative y postoperative periods of both groups. The presence of peripheral anterior synechia was scarce, without differences between baseline values, and after two months in both eyes for each group. The evidence of angular closure, at the end of the period, between the phacoemulsification group and the iridotomy one was 4.9 % vs. 23.2 % (p = 0.029) in the right eye, and 2.7 % vs. 29.0 % (p = 0.003) in the left. Conclusions: both, crystalline lens extraction and laser peripheral iridotomy improve the anatomical parameters of the anterior segment, although the results are greater in ayes treated with phacoemulsification.

A Composite Risk Score for Capsule Complications Based on Data from the Swedish National Cataract Register: Relation to Surgery Volumes.

PURPOSE: To investigate case mix in relation to capsule complication, possible associations between case mix and operation volume, and change in case mix over time. DESIGN: Register-based study. PARTICIPANTS: Swedish patients who underwent cataract surgery between 2007 and 2016. METHODS: Demographics and data on ocular comorbidity, intraoperative difficulties, and capsule complications were registered from 2007 to 2016 and analyzed retrospectively in relation to coded data on individual surgeons' operation volume. Single factor analysis and logistic regression were performed, and a composite risk score was created. MAIN OUTCOME MEASURES: Risk of capsule complication, given as adjusted and composite odds ratio in relation to cataract surgery volume. RESULTS: Preoperative and intraoperative variables significantly associated with capsule complications were best-corrected visual acuity (BCVA) ≤0.1 (decimal, adjusted odds ratio [aOR], 1.82; P < 0.001); pseudoexfoliation (PEX) (aOR, 1.53; P < 0.001); sight-threatening ocular comorbidity other than age-related macular degeneration (AMD), diabetic retinopathy, glaucoma, or cornea guttata (aOR, 1.35; P = 0.006); use of Trypan blue (aOR, 1.76; P < 0.001); mechanical pupil dilation (aOR, 1.36; P = 0.024); and iris hooks at the rhexis margin (aOR, 6.99; P < 0.001). The composite risk score was 3.09 ± 6.40 (mean ± standard deviation) for patients with capsule complication and 1.28 ± 1.66 for uncomplicated procedures (P < 0.001). High-volume cataract surgeons (≥500 procedures yearly) had a significantly lower composite risk score (mean risk score ≤1.28; range, 1.01-2.02) compared with low- and medium-volume cataract surgeons (1.34 ± 0.56; range, 1.00-4.55 and 1.49 ± 0.58; range, 1.01-5.19), respectively. During the period 2007-2016, the proportion of patients aged >88 years, patients with BCVA ≤0.1, and patients with intraoperative difficulties decreased. CONCLUSIONS: Case mix, as calculated from a composite risk score based on preoperative and intraoperative parameters registered in the National Cataract Register (NCR), may contribute to the decrease in capsule complications from 2007 to 2016 and the lower complication rate observed in cases managed by high-volume cataract surgeons.

Clinical practice preferences for glaucoma surgery in Japan: a survey of Japan Glaucoma Society specialists.

PURPOSE: This study evaluated the surgical practice patterns of glaucoma management followed by glaucoma specialists in Japan. METHODS: A survey was administered to 50 glaucoma specialists who were councilors in the Japan Glaucoma Society about surgical preferences and postoperative glaucoma care. RESULTS: All 50 glaucoma specialists participated in the survey. Results show that, in 2019, compared to conventional trabeculotomy (4.6%), the frequency of minimally invasive glaucoma surgery (MIGS), combined with phacoemulsification, remarkably increased (79.0%) for non-operated eyes with mild open-angle glaucoma associated with cataract. Tube-shunt surgery was performed more often for open-angle glaucoma with previously twice failed trabeculectomy (65.8%) and neovascular glaucoma with previously once failed trabeculectomy (63.4%). In addition, during one year post-operatively, MIGS required less frequent follow-up visits compared to filtering surgery. CONCLUSION: Although glaucoma specialists in the Japan Glaucoma Society usually prefer trabeculectomy, in the past decade they have selected tube-shunt surgery more often to treat refractory glaucoma. MIGS is increasing remarkably as the choice primary glaucoma surgery.

Risk Factors for Intraocular Lens Dislocation After Phacoemulsification: A Nationwide Population-Based Cohort Study.

PURPOSE: Few studies have measured the incidence and risk factors of intraocular lens (IOL) dislocation in the total population. We investigate the risk factors for IOL dislocation in a nationwide Korean cohort. DESIGN: Retrospective cohort study. METHODS: National data on 2,162,191 subjects who underwent cataract surgery were collected from the Health Insurance Review and Assessment service database of health claims from 2009 to 2016. The Health Insurance Review and Assessment database was used to identify potential risk factors for IOL dislocation, including age, sex, and various pre- and postoperative ophthalmic conditions. The hazard ratios (HRs) and confidence intervals (CIs) of these risk factors were assessed with a multivariable-adjusted Cox regression model. RESULTS: IOL dislocation occurred in 15,170 patients (0.7%) in the cataract surgery cohort (2,162,191 patients). The incidence rate of IOL dislocation peaked at 40-50 years of age, although the mean age of IOL dislocation was 65.25 ± 10.81 years. The average male:female ratio was 1.8. The adjusted HR for IOL dislocation in patients with partial vitrectomy was 11.93 (95% CI 10.95-12.99; P < .0001). Posterior capsulotomy performed within 1 year after the cataract surgery significantly decreased IOL dislocation, with an adjusted HR of 0.48 (95% CI 0.44-0.51; P < .0001). CONCLUSIONS: IOL dislocation tended to occur in young males. Anterior vitrectomy was a significant risk factor for IOL dislocation, while posterior capsulotomy after surgery was associated with a decreased risk of IOL dislocation.

Anticoagulation and cataract surgery.

AIM: To assess the impact of anticoagulation on patients having cataract surgery. METHODS: Patients who underwent cataract surgery with phacoemulsification and intraocular lens insertion between 1 January 2015 and 31 December 2015 at Christchurch Hospital were identified and retrospectively audited. The outcome measures were the occurrence of intraoperative and postoperative haemorrhage, and thromboembolic events within two weeks after surgery. A control group was included to assess the outcome measures in a sample of patients who were not on anticoagulants or antiplatelets. RESULTS: Forty-four anticoagulated patients (46 eyes) and 41 controls (46 eyes) were identified. Seventy-four percent of those anticoagulated were on warfarin and 26% were on dabigatran. The incidence of haemorrhagic complications was 18%, 25% and 11% in the warfarin, dabigatran and control groups, respectively, although these differences were not statistically significant. Apart from one vitreous haemorrhage, which may have been present preoperatively, the haemorrhages that occurred were minor and not visually significant. No thromboembolic events were noted in any of the groups. CONCLUSION: There is no statistically significant increase in haemorrhagic complications in cataract surgery patients who were on warfarin or dabigatran. Therefore, continuing the anticoagulation in this setting may be appropriate.

Predictors of patient compliance with follow-up visits after cataract surgery.

PURPOSE: To identify patient characteristics associated with follow-up compliance and to draw implications for better cataract treatment services. SETTING: Aravind Eye Hospital, Madurai, India. DESIGN: Retrospective case study. METHODS: The data of all cataract surgeries performed in 2015 were analyzed. After each surgery, patients were asked to return for follow-up after 1 month. The follow-up rates were compared between patients with different demographic characteristics, surgical factors, and preoperative and discharge visual acuities. The behaviors of patients who complied with the follow-up advice were analyzed, including the number of days from surgery to follow-up and number of follow-up visits. Multivariate regression models were used to identify predictors associated with these behaviors. RESULTS: The overall follow-up rate for the 86 776 surgeries analyzed was 85.6%. Patients more likely to follow-up were women, younger than 70 years, and paying (versus subsidized or free) and had phacoemulsification rather than manual small-incision cataract surgery (all P < .001). Patients who had complications, reoperations, or poorer visual acuity at discharge were less likely to comply with the follow-up advice (P < .001). CONCLUSIONS: Targeted interventions to boost follow-up rates should be directed to patients with the characteristics found in this study. Furthermore, average measures of visual outcomes at 4 weeks are likely to be overstated relative to the truth.

Incidence of posterior capsular opacification requiring Nd:YAG capsulotomy after cataract surgery and implantation of enVista® MX60 IOL.

PURPOSE: To evaluate incidence of posterior capsule opacification requiring Nd:YAG capsulotomy over 3 years in a large series of eyes implanted with the enVista® MX60 Intraocular Lens (IOL). METHODS: A university-based, single-center, observational study of patients' medical records was conducted. Uneventful cataract surgery patients with in-the-bag implantations of the enVista® MX60 IOL with a minimum of 24 months follow-up were included in the study. Exclusion criteria were insufficient follow-up (<24 months), intraoperative complications and combined surgery. The primary outcome measure was rate of YAG laser capsulotomy, while secondary outcome measures were time to YAG laser capsulotomy and rate of glistenings. RESULTS: A total of 245 eyes of 143 patients received the MX60 IOL and were followed in the same center. Of these, 226 eyes were included in the study. Mean age was 80.7±8.3 years and M/F ratio was 42/101 (29.4/70.6%). The mean preoperative distance (logMAR) visual acuity was 0.67±0.5, while postoperatively it was 0.31±0.5 and 0.32±0.5 at the last visit. The Mean±SD follow-up time (min-max) was 35.2±7.2, (24-48.4) months. The incidence of Nd:YAG capsulotomy over 3 years was 5/226 (2.2%). Average time between surgery and Nd:YAG capsulotomy was 32.17 months. Univariate analysis of age, gender, presence of comorbidity and baseline visual acuity found no predictive factors for capsulotomy. No glistenings were reported at any postoperative visit. CONCLUSION: The three-year cumulative incidence of PCO requiring Nd:YAG laser capsulotomy was 2.2% for the enVista® MX-60 IOL, with no glistenings observed during follow-up. This low rate confirms the excellent safety profile of this IOL.

Corneal Astigmatism in cataract surgery candidates / Astigmatismo Corneano em candidatos à cirurgia de catarata

Abstract Purpose: To report the prevalence and analyse corneal astigmatism patterns in cataract surgery candidates. Methods: Researchers examined 2136 eyes from 1204 patients for cataract surgery from 1 January to 31 December 2016. All the candidates were evaluated with partial coherence interferometry (IOLMaster). The results were analysed statistically in relation to qualitative and quantitative variables. Results: The mean age of the patients was 71.9 years with a female predominance. Mean corneal astigmatism was 1.0 dioptre (D). Against the rule (ATR) astigmatism increased with age. Women presented with steeper corneas than men. In those patients who had both eyes measured, we found strong correlations between amount of right and left eye astigmatism, axis and keratometry. Overall, 39% of the eyes had corneal astigmatism > 1.00 D and 19% >1.50 D. Conclusions: A significant percentage of our population presents with corneal astigmatism > 1.00 D with a shift from WTR (with the rule) to ATR with increasing age. Our findings, in a population that has never been described before, will be helpful to surgeons to enhance surgical techniques, patients to improve visual outcomes, IOL (intraocular lens) manufacturers to make better designs and health agents to optimise resources.

Resumo Objetivo: Relatar a prevalência e analisar os padrões de astigmatismo corneano em candidatos à cirurgia de catarata. Métodos: Os pesquisadores examinaram 2136 olhos de 1204 pacientes a cirurgia de catarata de 1 de janeiro a 31 de dezembro de 2016. Todos os candidatos foram avaliados com interferometria de coerência parcial (IOLMaster). Os resultados foram analisados estatisticamente em relação às variáveis qualitativa e quantitativa. Resultados: A média de idade dos pacientes foi de 71,9 anos, com predomínio do sexo feminino. A média de astigmatismo corneano foi de 1,0 dioptria (D). Contra a regra (ATR), o astigmatismo aumentou com a idade. As mulheres apresentaram córneas mais íngremes que os homens. Nos pacientes que tiveram os dois olhos medidos, encontramos fortes correlações entre quantidade de astigmatismo nos olhos direito e esquerdo, eixo e ceratometria. No geral, 39% dos olhos tinham astigmatismo corneano >1,00 D, e 19% > 1,50 D. Conclusões: Uma percentagem significativa da nossa população apresenta astigmatismo corneano >1,00, D com uma mudança de WTR (a favor da regra) para ATR (contra a regra) com o aumento da idade. Nossas descobertas em uma população que nunca foi descrita antes serão úteis para os cirurgiões melhorarem suas técnicas cirúrgicas, os pacientes melhorarem seus resultados visuais, os fabricantes de LIOs (lentes intraoculares) criarem projetos melhores, e os agentes de saúde otimizarem os recursos.