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Relevant bibliographies by topics / Cataract extraction

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Academic literature on the topic 'Cataract extraction'

Author: Grafiati

Published: 4 June 2021

Last updated: 30 July 2024

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Journal articles on the topic "Cataract extraction"

1

Naz, Shagufta, Nimrah Fiaz Sandhu, Eesha Sajjad, Saima Sharif, and Iram Arshad. "Prevalence of Congenital Cataract and Lens Extraction in Lahore Population." Lahore Garrison University Journal of Life Sciences 6, no. 03 (September 15, 2022): 216–26. http://dx.doi.org/10.54692/lgujls.2022.0603224.

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Congenital cataracts account for one-third of infant blindness globally and are one of the leading cause of vision loss in children. A retrospective study was performed between October 2020 and April 2021 on congenital cataract patients of Lahore visited ophthalmologic consultation at the Al Ehsaan eye hospital, General Hospital and Mayo hospital. The purpose of the study was to find the prevalence of congenital cataract in children. About 100 cases of congenital cataract including both male and female children were identified from age group of 1-13years. Congenital cataract was diagnosed using Snellen’s visual acuity test, ophthalmoscope and slit lamp test. Male children showed greater prevalence of congenital cataract as compared to female children. The prevalence of congenital cataract in male children was 55% (n=55) while among female children, it was 45% (n=45). Both conditions of unilateral and bilateral congenital cataract were observed with incidence of 46% (n=46) and 54% (n=54) in male and female children respectively. Lens extraction was also done in 94% (n=94) and after surgery 55% (n=52) patients showed positive response and 45% (n=42) patient had negative response for light perception. Moreover, most patients of congenital cataracts were of less than 1 year of age group. It was concluded congenital cataract may lead to childhood blindness if not treated on time.

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Appelboam, Helen. "Canine cataracts." Companion Animal 29, no. 1 (January 2, 2024): 2–7. http://dx.doi.org/10.12968/coan.2023.0053.

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The intraocular lens is uniquely designed to aid focused vision, and diseases of the lens such as cataracts are a common cause of blindness in dogs. The causes of cataracts are discussed including the main aetiologies such as hereditary cataract, senile and diabetic cataracts. The article focuses on dogs, as cataracts are less common in cats, although traumatic cataracts and rarely, inherited, congenital and developmental cataracts do occur in felines. The article discusses ways to examine and classify a cataract; the best way to diagnose an early cataract is examination with a veterinary ophthalmologist. Early detection is important, as it is not advised to breed from dogs affected with hereditary cataracts. Surgical extraction is currently the only method to remove a cataract and restore vision, and the common complications of cataract surgery are also explored.

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Rahman, Nurul Aini Abdul, and Ameilia Ahmad. "Double rosette cataract: a case report." Malaysian Journal of Ophthalmology 4, no. 1 (March 21, 2022): 82–85. http://dx.doi.org/10.35119/myjo.v4i1.178.

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Cataract is commonly seen in the elderly population and is a major cause of blindness in Malaysia. The most common morphological types of cataracts associated with the elderly are cortical, nuclear, and posterior subcapsular cataract. Rosette cataracts are commonly associated with blunt trauma. We report a case of a patient who presented with unilateral, non-traumatic, double rosette cataract. He successfully underwent cataract extraction with posterior chamber intraocular lens implantation and the final visual outcome was good.

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Schwab, Ivan R. "Cataract Extraction." Archives of Ophthalmology 106, no. 8 (August 1, 1988): 1062. http://dx.doi.org/10.1001/archopht.1988.01060140218027.

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Sobczak, Anna Maria, Bartosz Bohaterewicz, Magdalena Fafrowicz, Aleksandra Zyrkowska, Natalia Golonka, Aleksandra Domagalik, Ewa Beldzik, et al. "Brain Functional Network Architecture Reorganization and Alterations of Positive and Negative Affect, Experiencing Pleasure and Daytime Sleepiness in Cataract Patients after Intraocular Lenses Implantation." Brain Sciences 11, no. 10 (September 26, 2021): 1275. http://dx.doi.org/10.3390/brainsci11101275.

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Background: Cataracts are associated with progressive blindness, and despite the decline in prevalence in recent years, it remains a major global health problem. Cataract extraction is reported to influence not only perception, attention and memory but also daytime sleepiness, ability to experience pleasure and positive and negative affect. However, when it comes to the latter, the magnitude and prevalence of this effect still remains uncertain. The current study aims to evaluate the hemodynamic basis of daytime sleepiness, ability to experience pleasure and positive and negative affect in cataract patients after the intraocular lens (IOL) implantation. Methods: Thirty-four cataract patients underwent resting-state functional magnetic resonance imaging evaluation before and after cataract extraction and intraocular lens implantation. Both global and local graph metrics were calculated in order to investigate the hemodynamic basis of excessive sleepiness (ESS), experiencing pleasure (SHAPS) as well as positive and negative affect (PANAS) in cataract patients. Results: Eigenvector centrality and clustering coefficient alterations associated with cataract extraction are significantly correlated with excessive sleepiness, experiencing pleasure as well as positive and negative affect. Conclusions: The current study reveals the hemodynamic basis of sleepiness, pleasure and affect in patients after cataract extraction and intraocular lens implantation. The aforementioned mechanism constitutes a proof for changes in functional network activity associated with postoperative vision improvement.

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Rambhatla, Saptagirish, Srushti Bagde, Shashidhar VS, Samya Mujeeb, and Rajendra P. Maurya. "Combined intraocular and oculofacial surgeries." Indian Journal of Clinical and Experimental Ophthalmology 10, no. 2 (July 15, 2024): 243–47. http://dx.doi.org/10.18231/j.ijceo.2024.044.

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: Traditionally, a ‘combined surgery’ for ophthalmologists includes combined cataract extraction with other intraocular surgeries. However, literature is lacking on oculofacial procedures (eyelid, brow lift and facial surgery) combined with cataract extraction. : With this study, we aim to analyse the possibility and feasibility of simultaneous cataract and Oculoplastic procedures. Patients with operable cataracts and non-infective oculoplastic lesions, consenting to undergo simultaneous procedures were included in the study. We performed combined cataract and oculoplastic procedures in 122 patients, out of which 53 were males and 69 were females, 73 were ipsilateral and 49 contralateral eyes. The postoperative follow-up period was 1 month. We did not note any hemorrhage/ hematoma in any of our patients undergoing combined procedures. No post-operative ocular inflammation/ infection was noted after cataract extraction. We found that the combined procedure of ptosis under/ over correction with cataract extraction had no bearing on visual outcomes as compared to routine cataract outcomes. We noted no under or over-correction in patients undergoing ptosis correction. : Simultaneous extra-ocular and phacoemulsification is an option for patients reluctant for multistage procedures either by choice or medical recommendations. It is also an alternative for patients with poor medical compliance and works in favour of ergonomics and economy.

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Salama, Marwa M., Sherif A. GamalElDin, and Malak I. ElShazly. "Endothelial Cell Loss, Cumulative Dissipated Energy, and Surgically Induced Astigmatism in Sutureless Scleral Tunnel Phaco-Assisted Cataract Extraction in Advanced Cataracts." Journal of Ophthalmology 2022 (May 17, 2022): 1–6. http://dx.doi.org/10.1155/2022/4272571.

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Purpose. To evaluate sutureless scleral tunnel phaco-assisted cataract extraction in regards to the cumulative dissipated energy (CDE) used, the resulting endothelial cell loss (ECL), and the surgically induced astigmatism (SIA) in advanced cataracts. Methods. A prospective interventional uncontrolled case series was performed. Patients with advanced cataracts according to the Lens Opacities Classification System III (LOCS III) had sutureless scleral tunnel phaco-assisted cataract extraction. They were followed up one week, one month, and 3 months postoperatively for SIA and ECL. The used CDE was recorded. Results. The study included 198 eyes: 36 eyes (18.2%) with LOCS III grade nuclear opalescence (NO4) cataracts, 102 eyes (51.5%) with LOCS III grade NO5, and 60 eyes (30.3%) with LOCS III grade NO6. Three months postoperatively, the mean SIA was 0.94 ± 0.71D. The endothelial cell density (ECD) was reduced significantly to 2341.31 ± 471 cells/mm2 ( p = 0.0001 ) with a mean ECL of 5.39%. The mean CDE and ECL% were 0.174 ± 0.46 U/S (2.07%), 0.859 ± 0.42 U/S (5.01%), and 2.306 ± 0.89 U/S (8.01%) in LOCS III grade NO4, NO5, and NO6, respectively. The overall mean CDE was 1.17 ± 0.99 U/S, which was significantly correlated with the ECL ( p = 0.0001 ). Conclusion. Sutureless scleral tunnel phaco-assisted cataract extraction in advanced cataracts enabled reduction in CDE with good preservation of the ECD and acceptable SIA.

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Caputo, Anthony R., Suqin Guo, Rudolph S. Wagner, and William H. Constad. "A Modified Extracapsular Cataract Extraction for Pediatric Cataracts." Ophthalmic Surgery, Lasers and Imaging Retina 21, no. 6 (June 1990): 396–400. http://dx.doi.org/10.3928/1542-8877-19900601-05.

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Rosen, P. H., J. M. Twomey, and C. M. Kirkness. "Endocapsular cataract extraction." Eye 3, no. 6 (November 1989): 672–77. http://dx.doi.org/10.1038/eye.1989.103.

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Miller, S. "Extracapsular Cataract Extraction." British Journal of Ophthalmology 69, no. 2 (February 1, 1985): 154. http://dx.doi.org/10.1136/bjo.69.2.154-a.

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Dissertations / Theses on the topic "Cataract extraction"

1

Enfield, David. "History of Cataract Extraction." The University of Arizona, 2018. http://hdl.handle.net/10150/626670.

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Zaczek, Anna. "Cataract surgery in patients with diabetes mellitus : clinical studies /." Stockholm, 1999. http://diss.kib.ki.se/1999/91-628-3557-2/.

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Lundvall, Anna. "Outcome after surgery of congenital cataract /." Stockholm, 2002. http://diss.kib.ki.se/2002/91-7349-197-7/.

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Laurell, Carl-Gustaf. "Inflammatory response after cataract surgery : randomized controlled clinical and laboratory studies of different surgical techniques /." Stockholm, 1997. http://diss.kib.ki.se/1997/91-628-2762-6.

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Pereira, Tiago José Guardado. "Catarata: expectativas refractivas e visuais." Master's thesis, Faculdade de Ciências Médicas. Universidade Nova de Lisboa, 2008. http://hdl.handle.net/10362/4844.

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Este estudo têm como objectivo saber quais as expectativas visuais e refractivas no pré operatório dos indivíduos com catarata. Analisámos a concordância entre estas e o resultado final, seis meses após a cirurgia. Foi realizado de forma prospectiva através de um questionário estruturado, e decorreu no Serviço de Oftalmologia do Hospital Garcia de Orta E.P.E. Com uma amostra de 200 doentes (68,5% do sexo feminino; 31,5% do sexo masculino, de idades entre os 31 e 89 anos, com uma mediana de 72 anos). A maioria dos indivíduos apresentava um nível escolaridade primário. Não exerciam actividade laboral, 91,5%. Na fase pré-operatória 84,5% dos doentes apresentavam correcção óptica para ver ao longe e 88,0% para ver ao perto. 80,0% dos doentes já conheciam alguém que tinha sido operado a catarata e destes 63,8% estavam satisfeitos com o resultado final. Quando questionados sobre a expectativa de a visão voltar ao normal no pós-operatório, a maioria respondeu com uma expectativa de muito provável (99,5% para respostas iguais ou superiores a 5 na escala de 10 pontos de Likert). 44% dos doentes esperava vir a usar óculos para longe e 46,5% para perto. Na importância de ficar a ver bem sem óculos depois da cirurgia,a maioria respondeu que seria muito importante tanto para ver ao perto (72,5%), como para longe (73,5%), (p=000). 120 pessoas (60%) responderam que “não” à pergunta “Depois da cirurgia à catarata, pensa que vai ficar a ver bem ao perto e ao longe sem precisar de usar óculos”. O género associava-se com esta resposta (p=0,015). De facto, apenas 34% dos indivíduos do sexo feminino é da opinião de que não vai precisar de óculos para a ver bem ao perto e ao longe depois da cirurgia (versus 52,4% para os indivíduos do sexo masculino). No que diz respeito à escolaridade também encontrámos uma associação com significado estatístico (p=0,023). De facto,dos doentes que esperavam não vir a necessitar de usar óculos (para ver ao longe e ao perto), 36,3% nunca estudaram, 40% estudaram até ao ensino primário e 23,8% detinham um nível de escolaridade superior ao ensino primário. A análise e estudo das frequências absolutas sobre a existência de óculos ou compensação refractiva para longe e para perto seis meses após a cirurgia revelou que dos 176 indivíduos (88% da amostra inicial), aproximadamente 89% ficou com óculos para ver ao longe e 92% ficou com óculos para ver ao perto. Da análise exploratória, verificámos que a visão de longe com a melhor correcção óptica, para os casos operados apresenta uma mediana de 8/10 (max.=10/10 e mín.=0,05). A visão de perto com a melhor correcção óptica, para os casos operados apresenta uma mediana de 10/10 (max.=10/10 e mín.=0,05). Verificou-se que a mediana para a acuidade visual de perto é de 5/10 nos casos em que não houve prescrição de óculos e de 10/10 nos casos em que se verificou prescrição (mín.=0,05 e max.=10/10). Na acuidade visual para longe, verificámos 19 doentes sem correcção óptica (10,8% do valor total da amostra), no entanto destes, só sete (4%) atingiram os 10/10 de acuidade visual. A grande maioria dos doentes (89,2%), ficou com correcção óptica e destes 74 conseguiram uma acuidade visual de 10/10. Na acuidade visual para perto, verificámos que só 14 doentes ficaram sem correcção óptica (8% do valor total da amostra) e destes só dois, o correspondente a 1,1% do valor total da amostra conseguiram uma acuidade visual de 10/10. A grande maioria da amostra, 162 dos casos (89,2%), ficou com correcção óptica e atingiram os 10/10 de acuidade visual 94 destes casos, o correspondente a 53,4% do valor total da amostra. Verificámos que a expectativa de ficar com óculos para ver ao longe era muito elevada, tanto para os indivíduos que ficaram sem óculos como para os que ficaram com óculos (mediana =10 e 9 respectivamente). A expectativa de ficar com óculos para ver ao perto era muito elevada, tanto para os indivíduos que ficaram sem óculos como para os que ficaram com óculos a mediana é igual a 9. De referir, foram poucos os casos em que não foi feita prescrição de óculos, 8% da amostra para n=176, e destes só 21,4% com acuidade visual igual ou superior a 8/10.

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Frost, Neil Andrew. "Estimation of the population requirement for cataract surgery." Thesis, University of Bristol, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343356.

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7

Kugelberg, Maria. "Prevention of complications in pediatric cataract surgery /." Stockholm, 2004. http://diss.kib.ki.se/2004/91-7140-111-3/.

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Mattos, Fellipe Berno. "Outbreak of Ochrobactrum anthropi endophthalmitis following cataract surgery." Universidade Federal do Espírito Santo, 2013. http://repositorio.ufes.br/handle/10/5283.

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Made available in DSpace on 2016-08-29T15:38:41Z (GMT). No. of bitstreams: 1 tese_7206_Outbreak of Ochrobactrum anthropi endophthalmites following cataract surgery.pdf: 114449 bytes, checksum: c89d6abc157b93a9d71ed933dca2014c (MD5) Previous issue date: 2013-11-11
Endoftalmite infecciosa após cirurgia muitas vezes progride para deficiência visual significativa e irreversível. A tese descreve um surto de endoftalmite por Ochrobactrum anthropi ocorrido após cirurgia de catarata e propõe um novo protocolo de esterilização para minimizar o risco de novos casos. Prontuários de pacientes com diagnóstiico firmado de O. anthropi por cultura ou com achados clínicos sugestivos durante o surto foram revisados. Sete casos de endoftalmite por O. anthropi foram confirmados entre 24 de Julho e 10 de novembro de 2010. A causa mais provável do surto foi a contaminação da tubulação da máquina de facoemulsificação. Após a introdução do novo protocolo de esterilização, não houve mais casos de endoftalmite, independente da causa, em mais de 1000 procedimentos subsequentes.

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Filho, Roberto Saad. "Cirurgia de catarata por facoemulsificação versus extração extracapsular, realizadas por médicos residentes: análise de custos e desfechos clínicos." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/17/17150/tde-07062017-111324/.

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Introdução: A catarata é a principal causa de cegueira reversível no mundo e seu tratamento é exclusivamente cirúrgico, cujas técnicas mais difundidas são a extração extracapsular do cristalino (EECC) e a facoemulsificação (FACO). Objetivo: Avaliar custos e desfechos clínicos na cirurgia ambulatorial de catarata por FACO e EECC quando realizadas por médicos residentes do terceiro ano (R3). Material e Métodos: Foram avaliados os custos desses procedimentos, que incluíram: valores pagos aos profissionais, taxas hospitalares, materiais, medicamentos e equipamentos, e analisados os prontuários de pacientes operados por R3, utilizando as técnicas de FACO (n=576) e EECC (n=274), para obtenção de dados referentes à avaliação da acuidade visual (AV) pré-operatória e pós-operatória durante seis meses após a cirurgia, taxa de complicações intraoperatórias e ao número de consultas pós-operatórias. Resultados: O custo médio foi maior na FACO (USD 416) do que na EECC (USD 284), utilizando-se a conversão de moeda do dia 30 de dezembro de 2011. A AV média pré-operatória foi pior na EECC (1,73±0,62 logMAR) do que na FACO (0,74±0,54; p<0,01). O melhor resultado da AV média pós-operatória foi encontrado na FACO (0.21±0.36 logMAR) e na ECCE (0,63±0,63; p<0.01). No grupo FACO, 85% dos casos atingiram AV<=0,30 logMAR, já na EECC esse índice ocorreu em 45% deles (p<0.01). A taxa de complicações intraoperatórias foi menor na FACO (7,6%) do que na EECC (21%; p<0,01). A média de consultas pós-operatórias foi menor na FACO (4,5±2,4) versus EECC (5,6±2,3; p<0,01). Conclusão: Apesar de o custo médio da cirurgia ambulatorial de catarata atingir valor 46% maior na FACO, o uso desta técnica no ensino de R3 mostrou índice de complicações três vezes inferior, menor número de consultas pós-operatórias e melhores resultados para a AV pós-operatória do que os observados nas cirurgias por EECC.
Introduction: Cataract is the leading cause of reversible blindness in the world and cataract surgery is the main performed procedure to its treatment; the most widespread techiniques being the extracapsular extraction of lens (ECCE) and phacoemulsification (PHACO). Objectives: To assess costs and outcomes of cataract surgery by PHACO and by ECCE performed by residents in ophthalmology. Material and Methods: The estimated costs of the procedures include wages, and hospital costs (fees, medicines, medical supplies and equipments). Medical records of patients operated by third-year residents (R3) using PHACO (n=576) and ECCE (n=274) were included in order to collect data on the assessment of visual acuity (VA) before and 6 months after surgery, along with rates of intraoperative complications and total number of postoperative visits. Results: Mean total costs were significantly higher for PHACO (USD 416) than for ECCE (USD 284) (currency exchange for December 30, 2011). The average preoperative VA (logMAR) was worse for eyes submitted to ECCE, 1.73 ± 0.62, than for eyes submitted to PHACO, 0.74 ± 0.54 (p<0.01). Mean postoperative VA was better for PHACO, 0.21 ± 0.36 logMAR than for ECCE, 0.63 ± 0.63 (p<0.01). VA of 0.30 logMAR or better was achieved in 85% of cases for PHACO and in 45% for ECCE (p<0.01). The rate of intraoperative complications was significantly higher for EECC (21%) than for PHACO (7.6%) (p<0.01), and the mean number of postoperative visits was higher for ECCE (5.6 ± 2.3) than for PHACO (4.5 ± 2.4) (p<0.01). Conclusion: Although the average cost of cataract surgery performed by R3 is 46% higher in PHACO when compared with ECCE, the use PHACO by senior residents in ophtalmology showed complication rates three times lower, fewer postoperative visits and, most importantly, better postoperative VA than observed for ECCE.

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Wejde, Gisela. "Posterior capsule opacification and postoperative endophthalmitis following cataract surgery : predictive and protective factors /." Stockholm : Karolinska institutet, 2005. http://diss.kib.ki.se/2005/91-7140-291-8/.

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Books on the topic "Cataract extraction"

1

S, Nicholls C., ed. Cataract. London: Faber and Faber, 1985.

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Bobrow, James C. Lens and cataract. [San Francisco, Calif.?]: American Academy of Ophthalmology, 2009.

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Bobrow, James C. Lens and cataract. San Francisco, CA: American Academy of Ophthalmology, 2011.

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An, Henderson Bonnie, ed. Essentials of cataract surgery. Thorofare, NJ: SLACK Inc., 2007.

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Güell, José L. Cataract. Edited by European School for Advanced Studies in Ophthalmology. Basel: Karger, 2013.

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Sundararajan, R. Manual of practical cataract surgery. New Dehi: Jaypee Brothers Medical Publishers (P) Ltd, 2009.

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Hernandez, Camila M. Cataracts: Causes, symptoms, and surgery. Hauppauge, N.Y: Nova Science, 2010.

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Panel, Cataract Management Guideline. Management of functional impairment due to cataract in adults. Rockville, Md: U.S. Dept. of Health and Human Services, Public Health Service, Agency for Health Care Policy and Research, 1993.

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Brint, Stephen F., 1946- author and Sacchi Laura author, eds. Cataract surgery: Introduction and preparation. Thorofare, NJ: Slack Incorporated, 2014.

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1968-, Malhotra Raman, ed. Cataract: Assessment, classification, and management. Edinburgh: Elsevier, Butterworth Heinemann, 2007.

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Book chapters on the topic "Cataract extraction"

1

Zhang, Xinyu, Lixia Luo, Qianzhong Cao, Haotian Lin, and Yizhi Liu. "Pediatric Cataract Extraction." In Pediatric Lens Diseases, 153–76. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-2627-0_12.

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Aaron, Maria, Geoffrey Broocker, Jeff Pettey, and Geoffrey Tabin. "Extracapsular Cataract Extraction." In Essentials of Cataract Surgery, 219–34. 2nd ed. Boca Raton: CRC Press, 2024. http://dx.doi.org/10.1201/9781003524038-21.

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Shieh, Wen-Shi, and Ajay E. Kuriyan. "Post-Cataract Extraction Endophthalmitis." In Manual of Retinal Diseases, 579–82. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-20460-4_111.

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Atallah, Marwan, and Guillermo Amescua. "Cataract Extraction, Extracapsular (ECCE)." In Operative Dictations in Ophthalmology, 89–92. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-45495-5_20.

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McDonald, Marguerite. "Cataract Extraction, Malyugin Ring." In Operative Dictations in Ophthalmology, 97–100. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-45495-5_22.

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Ahmed, Ike K., and Matthew B. Schlenker. "Canaloplasty and Cataract Extraction." In Operative Dictations in Ophthalmology, 251–55. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-45495-5_56.

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Atallah, Marwan Raymond, and Guillermo Amescua. "Cataract Extraction: Extracapsular (ECCE)." In Operative Dictations in Ophthalmology, 155–58. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-53058-7_32.

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McDonald, Marguerite. "Cataract Extraction: Malyugin Ring." In Operative Dictations in Ophthalmology, 151–54. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-53058-7_31.

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Ahmed, Ike K., Matthew B. Schlenker, and Jeb Alden Ong. "Canaloplasty and Cataract Extraction." In Operative Dictations in Ophthalmology, 235–39. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-53058-7_49.

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Kreutzer, Thomas C. "Extracapsular and Intracapsular Cataract Extraction." In Cataract and Lens Surgery, 419–23. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-05394-8_56.

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Conference papers on the topic "Cataract extraction"

1

Snyder, Robert W., Mahendra G. Jani, Mike Yarborough, George R. Marcellino, Robert J. Noecker, Theresa R. Kramer, and Jesus Vidaurri. "Erbium:YAG laser for cataract extraction." In BiOS '98 International Biomedical Optics Symposium, edited by Pascal O. Rol, Karen M. Joos, and Fabrice Manns. SPIE, 1998. http://dx.doi.org/10.1117/12.309450.

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2

Kim, Jaehyun, Abhra Roy, Maryam Shariati, and James Lescoulie. "Computational Simulation of Flow to Improve Fluidic Stability in Cataract Surgery System." In ASME/JSME 2004 Pressure Vessels and Piping Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/pvp2004-3123.

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In this work, a CFD based design approach to improve fluidic stability of a cataract surgery system is presented. Cataract surgery is a procedure to remove hardened human lens (cataract) from the eye. Approximately two million cases of cataract surgery are done every year in the United States. The procedure starts with the incision of an aspiration port into the anterior chamber of the eye. The OD of the aspiration port is 0.9mm and is connected with vacuum pump and ultrasonic vibrator. After the incision, cataract is fragmented into small pieces using ultrasonic power. Finally, fragmented cataracts are extracted from the eye chamber using a vacuum pump. Current cataract surgery system has an issue of pressure surge followed by collapsing of the anterior chamber of the eye. In the extraction phase, often a big piece of cataract occludes the tip of the aspiration port to build up the pressure difference between the chamber and the pump. When the pressure difference reaches certain point the cataracts are abruptly pulled into the aspiration port. As a result of sudden displacement of cataract and the fluid from the chamber, pressure surges which causes eye chamber collapse. The collapsing of the chamber is not only dangerous to the organs in the anterior chamber such as cornea, but also it lifts the wall of posterior chamber and may damage the retina. Several different design concepts using mechanical and electrical feedback systems have been developed by Micro-Surgery Advanced Design Lab to improve fluidic stability of the system without significant influence upon the cycle time of the procedure. However, considering the size and precision required of the system and the complexity of the design parameters involved, feasibility test and design iterations using working prototypes may limit the possibility of finding an optimal solution to the design problem. In this work, a feasibility test method using computational flow analysis and bench-top simulation is proposed. In developing a design, it is suggested that the feasibility verification for the design concepts be divided into three different steps: CFD analysis, bench-top simulation and working prototype test. Each process filters the concepts before the concept is transferred to the next step and the results of each step are compared to improve the reliability. In CFD analysis, fluidic circuit is modeled to simulate the mechanisms of pressure surge and chamber collapse using CFDRC. Also, suggested design concepts are incorporated into the model to check the feasibility. In the interpretation of the results, the focus is on the estimation of time scale to see the validity of feedback system. Bench-top is an enlarged model of real eye and cataract surgery system. Dimensional analysis is used to design and interpret the result of the bench-top simulation. It has less flexibility in design changes than CFD analysis but easier to build and change than working prototypes because of the size. CFD analysis and bench-top simulation not only determine the initial feasibility of the design concept, but also it narrows down the design solution space to reduce the number of design iterations and save the time and cost for finding an optimal solution to the design problem.

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3

Giap, Binh Duong, Karthik Srinivasan, Ossama Mahmoud, Shahzad Ihsan Mian, Bradford Laurence Tannen, and Nambi Nallasamy. "Tensor-based Feature Extraction for Pupil Recognition in Cataract Surgery." In 2023 45th Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC). IEEE, 2023. http://dx.doi.org/10.1109/embc40787.2023.10340785.

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4

Rubin, Gary S., Ingrid A. Adamsons, and Walter J. Stark. "Improvement in Acuity, Glare and Contrast Sensitivity following Cataract Surgery." In Noninvasive Assessment of the Visual System. Washington, D.C.: Optica Publishing Group, 1992. http://dx.doi.org/10.1364/navs.1992.mb3.

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Visual acuity has long been used as the primary vision test for determining when cataract surgery is warranted and as the measure of its effectiveness. However over the past two decades several studies have been published which indicate that other aspects of visual function may be impaired in cataract patients who have reasonably good visual acuity (e.g. better than 20/40). With the advent of extracapsular cataract extraction and the widespread use of intraocular lenses, the indications for surgery have changed. No longer is it required that the patient’s acuity drop to 20/70 or worse. Surgery is often performed on eyes with 20/40 or better acuity when there are other symptoms of visual impairment, particularly a decline in contrast sensitivity or increased sensitivity to glare.

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5

Chorage, S. S., and Sayali S. Khot. "Detection of diabetic retinopathy and cataract by vessel extraction from fundus images." In 2017 International Conference of Electronics, Communication and Aerospace Technology (ICECA). IEEE, 2017. http://dx.doi.org/10.1109/iceca.2017.8203617.

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6

Rehkopf, Paul G., Joseph W. Warnicki, John C. Stuart, and Antonio Capone. "Glare Disability Following Nd: YAG Laser Posterior Capsulotomy." In Noninvasive Assessment of the Visual System. Washington, D.C.: Optica Publishing Group, 1986. http://dx.doi.org/10.1364/navs.1986.tua1.

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Following extracapsular cataract extraction up to 50% of all patients have visual impairment from posterior capsule opacification. This opacification may be due to migration of residual anterior chamber epithelial cells onto the posterior capsule. There may also be a proliferation of scleral cells creating globular Elschnig pearls1,2.

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7

Alborova, V. U., and S. YU Kopaev. "The state of clinical refraction of the avitreal eye after laser cataract extraction." In SCIENCE OF RUSSIA: GOALS AND OBJECTIVES. L-Journal, 2021. http://dx.doi.org/10.18411/sr-10-02-2021-02.

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8

Bakutkin, Valery V., and Vladimir A. Galanzha. "Role of intraocular lens parameters in visual rehabilitation of patients after extracapsular cataract extraction." In EOS/SPIE European Biomedical Optics Week, edited by Patrick Brouwer. SPIE, 2001. http://dx.doi.org/10.1117/12.413696.

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9

Ni, Xiao-Wu, Yong-Nian Li, Jian Lu, and Anzhi He. "Laser lysis for postcapsular fold after extracystic cataract extraction and postchamber artificial intraocular lens implantation." In OE/LASE'93: Optics, Electro-Optics, & Laser Applications in Science& Engineering, edited by Jean-Marie A. Parel and Qiushi Ren. SPIE, 1993. http://dx.doi.org/10.1117/12.147528.

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10

Franchini, Alessandro, Barbara Zamma Gallarati, Saverio Matteini, and Eleonora Vaccari. "Use of the erbium-Yag laser in cataract extraction and other applications in ophthalmic surgery." In Laser Florence 2001: a Window on the Laser Medicine World, edited by Leonardo Longo, Alfons G. Hofstetter, Mihail-Lucian Pascu, and Wilhelm R. A. Waidelich. SPIE, 2002. http://dx.doi.org/10.1117/12.486628.

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