The 100 most influential papers about cataract surgery: a bibliometric analysis

AIM: To identify the 100 most cited papers in cataract surgery, we performed a comprehensive bibliometric analysis basing on the literature search on the Thomson Reuters Web of Knowledge. METHODS: The number of citations, including the total citations, latest 5y citations and average citation number per year (ACY), authorship, year of publication, major topics, journal of publication, country and institution of origin of each paper were recorded and then analyzed. Pearson’s correlation analysis was conducted to evaluate the correlation between the published year and the number of citations. The correlation between journal’s impact factor (IF) and number of citations was assessed as well. RESULTS: The most cited paper was the classic paper done by the European Society of Cataract & Refractive Surgeons (ESCRS) group. This paper focused on the topic of endophthalmitis. Not only the most cited papers originated from the USA, but also some American institutions like Johns Hopkins University, Harvard Medical School, etc. had the most citations. Pearson’s correlation analysis indicated that the latest 5y citations and ACY were significantly related with the published year (5y citations: r=0.615, P<0.001; ACY: r=0.657, P<0.001), whereas no association between the total number of citations and published year was found (r=0.045). Moreover, the IFs of journals were found to have no significant effect on the number of total citations. CONCLUSION: To our knowledge, this is the first study on the most influential papers in cataract surgery after a comprehensive research of relevant literatures. The present work may provide us concise information concerning the development history of cataract surgery over the past 66y.     

The 100 most influential articles in myopia: a bibliometric analysis

AIM:To identify and characterize the 100 most influential articles in the field of myopia over the last decades.METHODS:Articles on myopia published between January 1975 and March 2020 were searched through the Web of Science Core Collection database.Two independent authors reviewed and determined the 100 most cited articles.The characteristics of each eligible article were recorded,including authors,institutions,countries,journals,publication date,total citations(TCs),annual citations(ACs),research focus and article type.RESULTS:The top 100 most influential articles were published between 1983 and 2016,with 1999 as the most prolific year.The mean number of TCs was 288(range:193-537)and the mean number of ACs was 19(range:7-109).Treatment and epidemiology of myopia were the most important research focus.These articles were published in 21 journals led by Ophthalmology(29%)followed by Investigative Ophthalmology&Visual Science(23%).The number of ACs for articles published in the last ten years was significantly higher than that for the other most-cited articles(44 vs 16,Mann-Whitney U test P<0.01).There is no difference in the number of TCs between original articles and review articles,while the number of ACs for review articles was significantly higher than that for original articles(22 vs 17,Mann-Whitney U test P<0.05).CONCLUSION:This bibliometric analysis can provide us with concise information about the development trend of research in the field of myopia in the past few decades,and provide an important reference for researchers to guide future research.     

Bibliometric analysis of research relating to refractive cataract surgery over a 20-year period: from 2003 to 2022

AIM: To investigate the research trend on refractive cataract surgery, compare the contributions of different countries, institutions, journals, and authors in the past 20y, and explore its potential research hotspots.METHODS: All publications were extracted relating to refractive cataract surgery from 2003 to 2022 from Web of Science. Document types were limited to original articles and reviews, and the language was limited to English. Quantitatively and qualitatively of the publications were analyzed through Microsoft Excel and GraphPad Prism. VOSviewer and CiteSpace were used for bibliometric and visualized analysis.RESULTS: A total of 2090 publications were enrolled. The United States contributed the most publications (434, 20.8%), followed by China (345, 16.5%) and England (163, 7.80%). Publications from the United States were cited more frequently (9552 citations) with the highest H-index of 48. China ranked second in the total number of publications, the papers were not cited that frequently (3237 citations), and the H-index ranked sixth (H-index=29). Journal of Cataract and Refractive Surgery published the most papers (333, 15.9%), and the University of London had the highest number of publications (75, 3.59%). Dick HB from Germany published the most papers. Corneal astigmatism-related research, cataract surgery method-related research, postoperative visual-quality relate to research, and postoperative complications-relate research are the hotspots in this field. The most significant limitation was that the database was updated frequently and the latest publications were not included.CONCLUSION: The bibliometric analysis shows a brief summarization of the contribution of the authors, institutions, countries, and journals. Corneal astigmatism, cataract surgery method, postoperative visual-quality and postoperative complications related researches have become the emerging hotspots, which can give a direction in the future researches.     

Citation analysis of the most influential authors and ophthalmology journals in the field of cataract and corneal refractive surgery 2000-2004

Purpose: To identify the most published authors on the topics of ‘cataract’ and ‘LASIK’, the journals in which they publish, and the citation patterns of the most‐cited articles by these authors over a 5‐year publication period. Methods: Science Citation Index Expanded (SCI) was used to identify the 30 most‐published authors in ‘cataract’ and ‘laser in situ keratomileusis’ (LASIK) (2000–2004 inclusive). SCI was subsequently used to analyse the recorded articles for each author in terms of source journal, the most commonly cited articles and citation source. Results: Of the 30 most‐published authors in the fields of cataract and LASIK, the USA was the most well‐represented source country, accounting for 33%; 20% were from Australia, and 17% from Austria. Germany and Japan each contributed 7%. Eighty per cent of the publications produced by these 30 authors (2000–2004) were in 10 journals, of which the Journal of Cataract and Refractive Surgery (JCRS) published more than one‐third. Of the three most‐cited articles for each author, the greatest number were published in JCRS (35.6%). The citation count of the articles had a weak correlation to the journal impact factor of the source journal; however, the self‐citation rate of these articles did not. Conclusions: The USA and Australia together were the source of more than half of the most‐published authors on cataract and LASIK and the majority of articles published by the 30 most prolific authors were published in only 10 journals. The impact factors of the publication journals preferred by these authors are influenced by the article citation counts, not vice versa.     

基于Web of Science ISI数据库白内障手术麻醉研究文献计量学分析

目的：从文献计量学的角度分析2001/2011年间白内障手术麻醉研究文献状况。

方法：利用Web of Science(科学网)为统计源,检索2001/2011年白内障手术麻醉研究文献,利用文献计量学方法,对“年出版文章数量、作者、来源出版物、学科类别、文献类型、文献语种、机构、国家/地区”方面进行统计分析。探讨研究趋势、文献分布等。

结果：统计Web of Science数据库中白内障手术麻醉文献量年度间变化呈波状趋势,发表以论著形式为主,约翰霍普金斯大学是主要研究机构,文献主要由眼科学人员报告,《白内障和屈光手术杂志》是主要文献来源。

结论：随着白内障手术的普及,手术麻醉的研究显得越来越重要,探索安全有效的麻醉方式具有重要的临床应用意义。     

Publication trends of primary angle-closure disease during 1991-2022: a bibliometric analysis

AIM: To perform a bibliometric analysis in the field of primary angle-closure disease (PACD) research to characterize current global trends and compare contributions from different countries, institutions, journals, and authors. METHODS: All PACD-related publications from 1991 to 2022 from the Web of Science Core Collection database were extracted. Microsoft Excel and VOSviewer were used to collect publication data, analyze publication trends, and visualize relevant results. RESULTS: A total of 1721 publications with 34 591 citations were identified. China produced the most publications (554) while ranking third in citations (8220 times). The United States contributed the most citations (12 315 times) with publications (362) ranking second. The Investigative Ophthalmology Visual Science was the most productive journal concerning PACD, and Aung Tin was the author with the highest number of publications in the field. Keywords were classified into three clusters, epidemiology and pathogenesis research, optical coherence tomography (OCT) and other imaging examinations, and glaucoma surgery treatment. Genome-wide association, susceptibility loci, OCT, and combined phacoemulsification have become new hot research topics in recent years since 2015. CONCLUSION: China, the United States, and Singapore make the most outstanding contributions in the field of PACD research. OCT, combined phacoemulsification, and gene mutation-related study, are considered the potential focus for future research.     

儿童白内障摘出联合人工晶状体植入术临床分析

目的评价儿童白内障摘出联合人工晶状体植入术的效果、并发症及防治措施。方法选择12岁以下的白内障术后患儿共43例(55眼),其中先天性白内障18例(30眼),外伤性白内障25例(25眼)。定期检查最佳矫正视力,双眼视功能,远期屈光状态和手术并发症,术后随访3~12月。结果视力均有不同程度提高。外伤性白内障组≥0.6者17眼(68.00%),先天性白内障组≥0.6者13眼(43.33%),术后常见的并发症为葡萄膜炎,后囊浑浊,角膜水肿等。后囊浑浊是造成视力下降的主要因素。结论儿童白内障及时诊断、早期手术,采用白内障摘出联合人工晶状体植入可以获得较好的视功能。后发障是主要的术后并发症。长期随访很重要。术后后发障等并发症和弱视治疗是获得良好视功能的关键。     

Bilateral cataract surgery: A controlled clinical trial

Purpose  To evaluate the efficacy and safety of simultaneous bilateral cataract surgery with respect to patient satisfaction, outcomes, and complication rates. Methods  We conducted a prospective study of consecutive patients who had simultaneous bilateral cataract surgery on the same day or separate bilateral cataract surgery with an interval of 2 days between operations. The changes in refraction, visual acuity, degree of anisometropia, and complication rates were compared between the simultaneous bilateral cataract surgery and separate bilateral cataract surgery groups. Patient satisfaction was assessed with a questionnaire. Results  Ninety-four patients who had simultaneous bilateral cataract surgery and 100 patients who had separate bilateral cataract surgery were enrolled in this study. The preoperative best-corrected visual acuity (logMAR) was 0.31 ± 0.17 in the simultaneous bilateral cataract surgery group and 0.29 ± 0.16 in the separate bilateral cataract surgery group, and it improved postoperatively to 0.11 ± 0.12 in the simultaneous bilateral cataract surgery group and to 0.10 ± 0.11 in the separate bilateral cataract surgery group. There was no significant difference between the two groups (P = 0.061). In addition, 96.8% of eyes in the simultaneous bilateral cataract surgery group and 97.0% of eyes in the separate bilateral cataract surgery group were within 1.0 diopters of the mean absolute error, and there were no sight-threatening intraoperative or postoperative complications in the two groups. Conclusions  Simultaneous bilateral cataract surgery may be an effective and safe bilateral cataract surgery option with a high degree of patient satisfaction.     

Benefits and risks of immediately sequential bilateral cataract surgery: a literature review

Immediately sequential bilateral cataract surgery (ISBCS) is a highly contended issue in ophthalmology, mainly due to the risk of bilateral endophthalmitis and financial penalties that many ophthalmologists face when performing simultaneous cataract surgeries. The purpose of this review is to understand the current status of the knowledge of ISBCS, mainly its benefits and risks and how they compare with the standard of care, delayed sequential bilateral cataract surgery. Evidence, although limited, increasingly supports ISBCS for providing faster rehabilitation, improved visual outcomes, and cost and time savings. Evidence does not support the fear of bilateral endophthalmitis resulting from the simultaneous procedure. However, stronger and greater evidence is needed before ISBCSs can be considered the standard of care. Where ISBCS can potentially create the most beneficial impact is in public eye health programmes in developing countries, but this has not yet been explored.     

独眼白内障手术的临床观察

目的探讨独眼(单眼)白内障手术的可行性。方法对49例独眼(单眼)白内障患者行手术治疗。其中21例行现代白内障囊外摘出并后房人工晶状体植入术,28例行晶状体超声乳化吸出并后房人工晶状体植入术。随访3~130月,平均63.6月。结果术后视力均有提高。视力在1.0及以上者6眼占12.25%,0.5~0.9者15眼占30.61%,0.1~0.4者27眼占55.10%,0.1以下者(0.07)1眼占2.04%。脱残率71.43%,脱盲率100%。结论只要对独眼(单眼)白内障患者采取认真、稳妥、负责的态度,制定个性化的手术方案,手术仍是安全和有效的。[注:“独眼”指单眼(unque eye),另眼已盲或近于盲且视力恢复无望者,非指“独眼畸形(cyclopia)”]     

Standard coaxial phaco microincision cataract surgery: a corneal endothelium study

To assess whether the new microincision cataract surgery (MICS) induces less endothelium damages than the standard coaxial phacoemulsification. · METHODS: Two hundred consecutive patients affected by age-related cataract were randomly assigned to undergo phacoemulsification using either standard coaxial phaco (SCP) or MICS. Central cornea and 12 o'clock endothelial cell count, cell size variation coefficient, percentage of hexagonality and central cornea thickness were measured before and up to one year after surgery. · RESULTS: One hundred and seventy-three patients completed the trial. At the one-year follow-up visit, the loss of endothelium cells was 6.5204% in the MICS group and 8.726% in the SCP group (P <0.00005). There were no significant differences between the two groups in terms of coefficient of variation in cell size, percentage of hexagonal cells, corneal thickness the day after surgery and variation of endothelial cell density measured both at the incision site and at the central cornea. In patients with hard cataracts, the increase in endothelial cell density loss was higher indepen- dently of the procedure. · CONCLUSION: MICS induces a significant lower endothelial cell density loss than SCP.     

利多卡因眼内麻醉在白内障术中的应用

应用０．５％利多卡因液眼内麻醉顺利完成３１例白内障囊外摘除联合后房型人工晶体植入术，０．５％利多卡因眼内注射无明显毒性及并发症，我们认为０．５％利多卡因溶液眼内麻醉是白内障手术安全、有效的麻醉方法     

Immediate versus delayed sequential bilateral cataract surgery: an analysis of costs and patient value

Purpose: To compare resource utilization of two different strategies for bilateral cataract surgery: immediate sequential cataract surgery (ISCS) versus delayed sequential cataract surgery (DSCS). The purpose was also to analyse the value for the patient of undergoing ISCS versus DSCS. Methods: Differences in routines and resource utilization between ISCS (n = 17) and DSCS (n = 80) were studied in a cohort of cataract surgery patients at our clinic in Karlskrona, Sweden. Costs were extracted from an earlier publication by the same clinic. The value for the patient was studied using the capability index, based on published data on the benefit to the patient of ISCS or DSCS using the Catquest questionnaire. Results: Operating both eyes of a patient was 1.14 times more expensive with DSCS than with ISCS including all surgical costs. The value to the patient of undergoing ISCS depended on the time between first‐ and second‐eye surgery in DSCS and the remaining lifetime after both‐eye surgery. A long waiting time for second‐eye surgery and a short remaining lifetime decreased the patient value of DSCS compared to ISCS. Conclusion: DSCS is 14% more expensive than ISCS. The value for the patient of ISCS compared to DSCS depends on how long the period will be between first‐ and second‐eye surgery in DSCS and also on the patient’s survival time after surgery.     

Immediately sequential bilateral cataract surgery versus delayed sequential bilateral cataract surgery: potential hospital cost savings

Objective: Cataract surgery represents a substantial cost to health care systems around the world. Canada's socialized medical system allows an opportunity to accurately track costing because of the institutional record keeping necessary for public reporting to provincial governments. Cataract surgical costs consist of medical costs, hospital costs, and social costs. Our study compared the hospital costs of immediately sequential bilateral cataract surgery (ISBCS) with delayed sequential bilateral cataract surgeries (DSBCS), minimizing other interfering variables.Design: Retrospective chart review with collection of associated costing information from the hospital.Participants: Twenty-two consecutive patients undergoing ISBCS with posterior chamber intraocular lens implantation and a randomly selected group of 22 patients undergoing similar DSBCS during the same period.Methods: Hospital costs were determined using the London Health Sciences Centre case-costing system. Average costs were calculated and compared statistically.Results: Average hospital costs were significantly reduced when performing ISBCS (p < 0.0001); 2 separate unilateral cataract surgeries totaled $ 1566.30, compared with $ 1059.10 for one bilateral cataract surgery (32.4% reduction). Pre- and post-operative in-hospital care accounted for a significant portion of this difference (54%), as 2 separate surgeries cost $547.92 compared with $273.96 for ISBCS.Conclusions: ISBCS provided considerable hospital cost savings compared to DSBCS.     

白内障术后屈光状态的影响因素

白内障术后的屈光状态及其稳定性是保证良好术后视觉质量的重要环节,术后屈光状态受生物测量的准确性（包括角膜屈光力、眼轴长度、前房深度、人工晶状体计算公式等）、角膜屈光状态（如角膜散光、圆锥角膜及角膜屈光手术史等）、人工晶状体有效位置及晶状体囊膜等因素影响。眼科医师应重视这些因素,在制定手术方案、实施手术过程中认真对待。这对促使我国白内障手术水平向屈光手术标准迈进具有重要意义。（眼科, 2013, 22: 73-76）     

儿童白内障术后并发症的临床分析

目的　探讨儿童不同类型白内障不同类型的手术方法其术后并发症发生的情况。方法　12 6例(14 8眼)先天性白内障和112例(112眼)外伤性白内障,分别行注吸套管抽吸(81眼)及应用超声乳化注吸系统抽吸(179眼)均联合人工晶状体植入,观察其术后并发症发生的情况。结果　儿童白内障术后主要并发症是人工晶状体前膜形成、人工晶状体瞳孔夹持、瞳孔变形及后发性白内障。应用超声乳化注吸系统抽吸术后并发症发生率低于注吸套管抽吸术,先天性白内障术后并发症发生率低于外伤性白内障(χ2 =12 . 2 8　P <0 . 0 1) ,二者差异有非常显著意义。结论　影响儿童白内障术后视力的主要原因是并发症的形成。选择适当的手术方法可以降低并发症的发生率,作好术前、术后的处理尤其重要。     

小切口非超声乳化白内障摘出手术100例临床分析

目的 为探讨小切口非超声乳化白内障摘出人工晶状体植入术的临床疗效.方法 对100例（128眼）小切口非超声乳化白内障摘出手术,手术前后视力和角膜散光对比分析.结果 术后矫正视力≥0.5者118眼（92.19%）,≥1.0者90眼（70.31%）.术前平均角膜散光为（0.42＋1.16）D,术后平均角膜散光为（1.68±2.09）D,96%的患眼术后散光在1.18D以内.结论 术中、术后并发症少,与超声乳化术比较,成本、费用少,也可获得良好效果.