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Corneal suture for acute corneal hydrops secondary to post-LASIK ectasia: a case report
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Diniz, Daniel

; Andrade, Fábio Mendonça Xavier

; Chamon, Wallace

; Allemann, Norma

Arquivos Brasileiros de Oftalmologia

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dec 2020, Volume 83 N. 6 Pages 538 - 542

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO A ectasia corneana é uma das principais complicações das cirurgias refrativas. Neste caso, descrevemos um caso de ectasia corneana induzida por laser-assisted in situ keratomileusis, que evoluiu com hidrópsia aguda e extravasamento de humor aquoso, necessitando de sutura corneana.

ABSTRACT Corneal ectasia is one of the main complications of keratorefractive procedures. In this report, we describe a case of corneal ectasia after laser-assisted in situ keratomileusis), which progressed with acute hydrops and aqueous leakage and required a suture for correction.

https://doi.org/10.5935/0004-2749.20200098 350 downloads

Use of virtual reality equipment to assess the manual dexterity of applicants for ophthalmology residency
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Vieira, Ibraim Viana

; Sakaya, Bruno Nogueira

; Soares, Lucas Valadao de Brito

; Chamon, Wallace

Arquivos Brasileiros de Oftalmologia

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aug 2020, Volume 83 N. 4 Pages 294 - 298

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO Objetivo: Avaliar os resultados da destreza da microcirurgia de duas avaliações sequenciais de treinamento usando a tecnologia de realidade virtual. Métodos: Estudo transversal multicêntrico em que todos os candidatos que foram aceitos como residentes de primeiro ano em uma de seis instituições de ensino de oftalmologia. Os residentes foram submetidos a duas séries idênticas de testes de destreza padronizados e reprodutíveis usando equipamento de realidade virtual (Eyesi®): “sequência 1” e “sequência 2”. Cada sequência consistiu em 5 níveis de dificuldade que foram avaliados usando um sistema de pontuação proprietário. Os dados foram testados quanto à normalidade utilizando o teste de Shapiro-Wilk. As diferenças entre os testes nas sequências 1 e 2 foram avaliadas com o teste de Wilcoxon signed-rank. Resultados: Os dados não seguiram uma distribuição normal. Houve melhora da sequência 1 em todos os testes (todos os valores de p<0,05). A soma de todas as pontuações (pontuação total) melhorou da sequência 1 (mediana= 152,50) para a sequência 2 (mediana= 256,00; p<0.001). Não houve correlação entre os valores da sequência delta e as pontuações médias. Conclusão: Duas avaliações sequenciais de treinamento utilizando a tecnologia de realidade virtual mostraram melhora relevante nas quantificações da destreza da microcirurgia. Essas informações devem ser consideradas se abordagens de realidade virtual forem utilizadas para fins de teste, pois a experiência prévia pode levar a melhores resultados.

ABSTRACT Purpose: To assess the microsurgery dexterity outcomes of two sequential training evaluations using virtual reality technology. Methods: This was a multicenter cross-sectional study of all candidates who were accepted as first-year residents at one of six ophthalmology teaching institutions. Residents were subjected to two identical series of standardized, reproducible dexterity tests using virtual reality equipment (Eyesi®): “sequence 1” and “sequence 2.” Each sequence consisted of five difficulty levels that were assessed using a proprietary scoring system. The data were tested for normality using the Shapiro-Wilk test. The differences between tests in sequences 1 and 2 were evaluated using the Wilcoxon signed-rank test. Results: The data did not follow a normal distribution. There were improvements from sequence 1 in all the tests (all p values<0.05). The sum of all scores (total score) improved from sequence 1 (median= 152.50) to sequence 2 (median 256.00; p<0.001). There was no correlation between the delta sequence values and the average scores. Conclusion: Two sequential training evaluations using virtual reality technology showed relevant improvement in quantifications of microsurgery dexterity. This information should be considered if virtual reality approaches are used for testing purposes, as previous experience may lead to improved test results.

https://doi.org/10.5935/0004-2749.20200050 693 downloads

Nasal Polyposis: More than a Chronic Inflammatory Disorder-A Disease of Mechanical Dysfunction- The São Paulo Position
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Pezato, Rogerio

; Voegels, Richard Louis

; Pignatari, Shirley

; Gregório, Luiz Carlos

; Bezerra, Thiago Freire Pinto

; Gregorio, Luciano

; Balsalobre, Leonardo

; Tepedino, Miguel Soares

; Coronel, Nathália

; Pinna, Fabio de Rezende

; Mendes Neto, José

; Oliveira, Pedro

; Macoto, Eduardo

; Stefanini, Renato

; Figueiredo, Claudia

; Haddad, Fernanda

; Pilan, Renata

; Soter, Ana Bezerra

; Melo, Nelson Almeida

; Candido, Danilo Almeida

; Amaral, Jonatas do

; Santos, Rodrigo de Paula

; Zele, Thibaut Van

; Fujita, Reginaldo

; Dreyfuss, Juliana L.

; Chamon, Wallace

; Alencar, Adriano Mesquita

; Perez-Novo, Claudina

; Stamm, Aldo Cassol

International Archives of Otorhinolaryngology

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jun 2019, Volume 23 N. 2 Pages 241 - 249

Abstract: En | Text: En | PDF: En

Abstract Introduction The importance of our study lies in the fact that we have demonstrated the occurrence ofmechanical dysfunction within polypoid tissues, which promotes the development of polyps in the nasal cavity. Objective To change the paradigm of nasal polyposis (NP). In this new conception, the chronic nasal inflammatory process that occurs in response to allergies, to pollution, to changes in the epithelial barrier, or to other factors is merely the trigger of the development of the disease in individuals with a genetic predisposition to an abnormal tissue remodeling process, which leads to a derangement of the mechanical properties of the nasal mucosa and, consequently, allows it to grow unchecked. Data Synthesis We propose a fundamentally new approach to intervening in the pathological process of NP, addressing biomechanical properties, fluid dynamics, and the concept of surface tension. Conclusion The incorporation of biomechanical knowledge into our understanding of NP provides a new perspective to help elucidate the physiology and the pathology of nasal polyps, and new avenues for the treatment and cure of NP.

https://doi.org/10.1055/s-0038-1676659 601 downloads

On the shoulders of giants
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Chamon, Wallace

Arquivos Brasileiros de Oftalmologia

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nov 2018, Volume 81 N. 6 Pages V - VII

Abstract: En | Text: En | PDF: En

https://doi.org/10.5935/0004-2749.20180103 700 downloads

Complete depigmentation of a small aperture corneal inlay implanted for compensation of presbyopia
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Campos, Mauro

; Beer, Sandra

; Nakano, Eliane Mayumi

; Muccioli, Cristina

; Belfort Jr., Rubens

; Chamon, Wallace

Arquivos Brasileiros de Oftalmologia

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jan 2017, Volume 80 N. 1 Pages 52 - 56

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO Descrevemos um caso de importante despigmentação de início tardio de implante corneano de pequena abertura implantada para compensação de presbiopia. O paciente foi um dos participantes de ensaio clínico destinado a avaliar a segurança e eficácia do AcuFocusTM ACU-10R160, uma película de poliimida de 10 microns de espessura, tingida com um corante orgânico. A implantação ocorreu sob um flap de Lasik criado por microcerátomo mecânico ajustado para profundidade de 120 µm. O caso aqui descrito foi avaliado 11 anos após a cirurgia, relatando diminuição de acuidade de visão para perto. O exame clínico mostrou ausência total de pigmentos no dispositivo e perda total do efeito inicial na visão de perto, apesar da visão normal para distância. A refração manifesta permaneceu estável durante o período de seguimento. As imagens de Scheimpflug caracterizaram a perda do efeito da abertura pequena na luz entrante. A análise de microscopia confocal revelou pequenas imagens hiper-reflexivas redondas sobre o endotélio, sem sinais de inflamação.

ABSTRACT We describe a case of late-onset remarkable depigmentation of a small aperture corneal inlay implanted for presbyopia compensation. The patient was a participant in a clinical trial designed to evaluate the safety and efficacy of the AcuFocusTM ACU-10R160, which is a 10 µm-thick polyimide film tinted with an organic dye. Inlay implantation occurred under mechanical microkeratome Lasik flaps set for a depth of 120 µm. The patient returned to the clinic 11 years after surgery and reported loss of near-vision acuity. Clinical examination showed the complete absence of pigments in the device and the total loss of the initial effect on near vision, despite normal distance vision. Manifest refraction remained stable during the follow-up period. Scheimpflug images characterized the loss of the small aperture effect on incoming light. Confocal analysis revealed small hyper-reflective round images on the endothelium and no signs of inflammation.

https://doi.org/10.5935/0004-2749.20170014 1422 downloads

Crosslinking enters public health armamentarium in Brazil
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Chamon, Wallace

Arquivos Brasileiros de Oftalmologia

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oct 2016, Volume 79 N. 5 Pages V - VI

Abstract: En | Text: En | PDF: En

https://doi.org/10.5935/0004-2749.20160082 908 downloads

What is plagiarism after all?
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Chamon, Wallace

; Dantas, Paulo E. C.

Arquivos Brasileiros de Oftalmologia

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apr 2016, Volume 79 N. 2 Pages V - VI

Abstract: En | Text: En | PDF: En

https://doi.org/10.5935/0004-2749.20160021 3464 downloads

The challenge for ?multilingual? scientists in Brazil
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Kara-Junior, Newton

; Ambrósio Jr., Renato

; Chamon, Wallace

; Leme, Luiz Eugenio Garcez

Clinics

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2014, Volume 69 N. 5 Pages 306 - 307

Abstract: En | Text: En | PDF: En

https://doi.org/10.6061/clinics/2014(05)01 908 downloads Cited 1 time in SciELO

Plágio e condutas inadequadas em pesquisa: onde chegamos e o que podemos fazer
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Chamon, Wallace

Arquivos Brasileiros de Oftalmologia

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dec 2013, Volume 76 N. 6 Pages V - VI

Abstract: Pt | Text: Pt | PDF: Pt

4242 downloads Cited 1 time in SciELO

10.

Assessment of pupillary influence in LASIK patients using a digital pupillometer and VQF 25 questionnaire
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Andrade, Eduardo Marcelo Moron de

; Chamon, Wallace

Arquivos Brasileiros de Oftalmologia

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oct 2013, Volume 76 N. 5 Pages 296 - 300

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

OBJETIVO: Identificar perfis ideais em pacientes submetidos à cirurgia fotorrefrativa a laser com o auxílio de um pupilômetro automatizado e análise psicométrica de pacientes com o questionário de função visual (VQF 25). MÉTODOS: Setenta e sete pacientes submetidos à cirurgia fotorrefrativa a laser (LASIK) foram analisados com o auxílio de um pupilômetro digital automatizado baseado em uma câmera de infravermelho acoplado à cabeça óptica de um sistema de videoceratografia. Os pacientes foram submetidos à avaliação oftalmológica completa e documentação do comportamento pupilar em diferentes intensidades de iluminação, simulando situações da vida cotidiana. O questionário de qualidade da função visual, traduzido para o Português, foi avaliado. RESULTADOS: Todos os pacientes, independentemente da mudança pupilar em diferentes condições de iluminação (escotópica, mesópica e fotópica) apresentaram melhora em todos os subgrupos do VQF 25. O diâmetro pupilar não foi o principal determinante da satisfação visual dos pacientes. CONCLUSÃO: Apesar do pupilômetro digital ter provado ser uma ferramenta útil na documentação e compreensão do comportamento da pupila, um conjunto de fatores, tais como o perfil psicossocial, ametropia pré-operatória e ametropia residual final, contribuiu de forma decisiva para determinar o grau de satisfação dos pacientes submetidos a LASIK.

PURPOSE: Identify ideal profiles in patients undergoing to photorefractive laser surgery with the aid of an automated pupillometry and psychometric analysis of patients with visual function questionnaire (VQF 25). METHODS: Seventy-seven patients undergoing photorefractive laser surgery laser (LASIK) were analyzed with the aid of an automated digital pupillometer based on an infrared camera coupled to the optical head of a videokeratography system. Patients underwent complete ophthalmic evaluation and documentation of the pupillary behavior under different intensities of illumination, simulating situations of everyday life. Visual quality function questionnaire, translated to Portuguese was assessed. RESULTS: All patients, regardless of pupillary change under varying conditions of illumination (scotopic, mesopic and photopic) showed improvement in all sub-groups of the VQF 25. Pupil diameter was not the primary determinant of patients' visual satisfaction. CONCLUSION: Despite digital pupillometer has proven to be a useful tool in documenting and understanding of pupil behavior, a set of factors such as psycho-social profile, preoperative ametropy and final residual ametropy, contributed decisively to determine the degree of satisfaction of patients undergoing LASIK.

2242 downloads

11.

As letras pequenas no final da página
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Chamon, Wallace

Arquivos Brasileiros de Oftalmologia

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jun 2013, Volume 76 N. 3 Pages V - V

Abstract: Pt | Text: Pt | PDF: Pt

2266 downloads Cited 1 time in SciELO

12.

A questão do idioma nas Revistas Oftalmológicas Brasileiras
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Chamon, Wallace

Arquivos Brasileiros de Oftalmologia

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feb 2013, Volume 76 N. 1 Pages V - VI

Abstract: Pt | Text: Pt | PDF: Pt

1344 downloads

13.

Paixão, publicação, promoção e pagamento: quais "Ps" motivam os cientistas?
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Chamon, Wallace

Arquivos Brasileiros de Oftalmologia

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dec 2012, Volume 75 N. 6 Pages 381 - 382

Abstract: Pt | Text: Pt | PDF: Pt

1580 downloads Cited 2 times in SciELO

14.

Neste fascículo dos ABO
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Chamon, Wallace

Arquivos Brasileiros de Oftalmologia

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oct 2012, Volume 75 N. 5 Pages 305 - 305

Abstract: Pt | Text: Pt | PDF: Pt

1180 downloads

15.

ABO entrou no Sistema ScholarOne
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Chamon, Wallace

Arquivos Brasileiros de Oftalmologia

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aug 2012, Volume 75 N. 4 Pages 231 - 232

Abstract: Pt | Text: Pt | PDF: Pt

2440 downloads

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