9 results on '"Cirurgia da córnea a laser"'
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2. Avaliação do conhecimento sobre cirurgia refrativa por meio de questionário eletrônico.
- Author
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Valle Oliveira, Thiago Gadelha, Ramos da Fonseca Filho, João Batista, Garcia Criado, Guilherme, Sena Junior, Nelson Batista, and Ambrósio Júnior, Renato
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OPHTHALMIC surgery , *PHOTOREFRACTIVE keratectomy , *CONTINUING education , *OPERATIVE surgery , *PATIENT education , *POPULATION aging , *OPHTHALMOLOGISTS , *REFRACTIVE lamellar keratoplasty , *CORNEA - Abstract
Objective: The purpose of this study was to develop and apply an online questionnaire to assess knowledge in Refractive Surgery in the analyzed population. Methods: An online questionnaire was applied to a population composed of 840 volunteer participants over 18 years of age. Results: The mean age of population was 37.85 years, of whom 60.1% were female. 20.95% of the participants reported having undergone previous eye surgery, 73.86% of which had a refractive objective. Among these, 73.08% were satisfied / very satisfied with the result. The most important criterion when choosing a refractive surgeon was the indication by a friend who underwent the procedure (43.81%). It is noteworthy that the participants who underwent refractive surgery disagreed more than the other people that “the surgery is a simple and risk-free procedure” (p = 0.0045) and that “the main objective of the surgery is to “zero” the diopter” (p = 0.0252). Conclusion: It is essential to improve population’s preoperative knowledge about Refractive Surgery, as well as continuing education for ophthalmologists. Therefore, this study encourages the development of new education tools with clear and easily accessible information, which should be informative, and not convincing. [ABSTRACT FROM AUTHOR]
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- 2023
- Full Text
- View/download PDF
3. Femtosecond laser-assisted anterior lamellar keratoplasty with suboptimal outcomes: a case series.
- Author
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Caldeira Abreu Veloso, Artur William, van Zyl, Tavé, Jurkunas, Ula, and Pineda, Roberto
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CORNEAL transplantation , *CORNEA surgery , *REFRACTIVE lamellar keratoplasty , *PARS plana , *POSTOPERATIVE care , *VISUAL acuity , *ASTIGMATISM , *PENETRATING wounds - Abstract
Objective: To identify preoperative clinical characteristics of patients undergoing femtosecond laser-assisted anterior lamellar keratoplasty who failed to achieve optimal postoperative visual outcomes. Methods: In this single-center, retrospective case series, patients who underwent femtosecond laser-assisted anterior lamellar keratoplasty between 2013 and 2018 were included if they required graft revision, subsequent corneal procedure, or additional postoperative visits for a femtosecond laser-assisted anterior lamellar keratoplasty-related issue. Visual outcomes assessed included best-corrected visual acuities and postoperative corneal astigmatism. Results: Eight eyes of eight patients meeting the above criteria were included. Mean patient age was 64.5 years (range, 21 to 89 years). Mean included preoperative best-corrected visual acuities was one logarithm of the minimum angle of resolution (range, 0.3 logarithm of the minimum angle of resolution to counting fingers). Indications for femtosecond laser-assisted anterior lamellar keratoplasty included anterior stromal scarring due to viral keratitis (two cases), bacterial keratitis (one case), chronic epithelial defect (one case), Avellino dystrophy (one case), trauma (one case), and chronic endothelial failure (two cases). Six patients had history of prior intraocular surgeries including phacoemulsification (four cases), pars plana vitrectomy (one case), endothelial keratoplasty (two cases), and trabeculectomy (one case). Mean included best-corrected visual acuities at most recent follow-up was one logarithm of the minimum angle of resolution (range zero logarithm of the minimum angle of resolution to hand movements) representing improvement or stability in six of eight patients. Visually significant corneal astigmatism was present in four of eight patients. Post-femtosecond laser-assisted anterior lamellar keratoplasty procedures included graft repositioning, arcuate keratotomy, phacoemulsification, and regraft. Conclusion: While femtosecond laser-assisted anterior lamellar keratoplasty offers a less-invasive treatment option compared to penetrating keratoplasty, intraoperative and postoperative management can be complex. Femtosecond laser-assisted anterior lamellar keratoplasty in patients with history of prior endothelial keratoplasty or ongoing ocular comorbidities should be pursued with caution. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
4. Remodelamento corneano: relato de um experimento com um vitrigel a base de colágeno tipo I para remodelamento de córneas porcinas
- Author
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Marquezan, Maria Carolina, Freitas, Denise de, Majumdar, Shoumyo, Wang, Xiaokun, Elisseeff, Jennifer, Guyton, David L., Bower, Kraig Scot, Skurski, Zachary P., Chalita, Maria Regina, Belfort Jr, Rubens, and Jun, Albert S.
- Subjects
Corneal stroma ,Swine ,Corneal surgery ,Proteses e implantes ,Animais ,Suínos ,Substância própria ,Materiais bio-compatíveis ,laser ,Cornea ,Córnea ,Prostheses and implants ,Lasers de excimer ,Animals ,Corneal topography ,Biocompatible materials ,Lasers excimer ,Cirurgia da córnea a laser - Abstract
Purpose: This study aimed to report an experiment designed to determine anatomical changes in porcine corneas following placement of a novel polymer implant into the cornea. Methods: An ex vivo porcine eye model was used. A novel type I collagen-based vitrigel implant (6 mm in diameter) was shaped with an excimer laser on the posterior surface to create three planoconcave shapes. Implants were inserted into a manually dissected stromal pocket at a depth of approximately 200 μm. Three treatment groups were defined: group A (n=3), maximal ablation depth 70 μm; Group B (n=3), maximal ablation depth 64 μm; and group C (n=3), maximal ablation depth 104 μm, with a central hole. A control group (D, n=3) was included, in which a stromal pocket was created but biomaterial was not inserted. Eyes were evaluated by optical coherence tomography (OCT) and corneal tomography. Results: Corneal tomography showed a trend for a decreased mean keratometry in all four groups. Optical coherence tomography showed corneas with implants placed within the anterior stroma and visible flattening, whereas the corneas in the control group did not qualitatively change shape. Conclusions: The novel planoconcave biomaterial implant described herein could reshape the cornea in an ex vivo model, resulting in the flattening of the cornea. Further studies are needed using in vivo animal models to confirm such findings. RESUMO Objetivo: Relatar um experimento projetado para determinar alterações anatômicas em córneas porcinas após a colocação de um novo implante de polímero na córnea. Métodos: Foi utilizado olho de porco ex vivo. Um novo agente modelador biocompatível, de colágeno tipo 1, com 6mm de diâmetro foi moldado com excimer laser em sua face posterior, para criar três formatos planocôncavos. Os implantes foram inseridos dentro de um bolsão, dissecado manualmente, a 200 micrômetros (μm). Foram definidos três grupos de tratamento: grupo A (n=3), teve a profundidade máxima de ablação de 70 μm; o grupo B (n=3), profundidade máxima de ablação de 64 μm; e o grupo C (n=3), profundidade máxima de ablação de 104 μm, com buraco central. O grupo controle, D (n=3), foi incluído, com a criação do bolsão estromal, porém sem inserir o material. A avaliação desses olhos foi realizada por tomografia de coerência óptica (OCT) e por tomografia corneana. Resultados: A tomografia corneana mostrou uma tendência para diminuição da ceratometria média em todos os 4 grupos. A tomografia de coerência óptica mostrou córneas com implantes localizados no estroma anterior e aplanamento visível, enquanto as córneas não mudaram qualitativamente o formato no grupo controle. Conclusões: O novo implante de biomaterial planocôncavo descrito aqui foi capaz de remodelar a córnea em modelo de animal ex vivo, resultando no aplanamento corneano. Novos estudos são necessários usando modelos animais in vivo para confirmar tais achados.
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- 2023
5. Focal phototherapeutic keratectomy for the treatment of apical leucoma syndrome.
- Author
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Coral Ghanem, Vinicius, Lordello Passos, Marilia, Luís Piccinini, André, and Coral Ghanem, Ramon
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HYPEROPIA ,REFRACTIVE lamellar keratoplasty ,LASIK research ,CORNEA surgery ,PHOTOREFRACTIVE keratectomy - Abstract
Copyright of Arquivos Brasileiros de Oftalmologia is the property of Arquivos Brasileiros de Oftalmologia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2018
- Full Text
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6. Corneoscleral contact lenses fitting on irregular corneas after laser-assisted in situ keratomileusis.
- Author
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Montalt, Juan Carlos, Porcar, Esteban, España-Gregori, Enrique, and Peris-Martínez, Cristina
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CONTACT lenses ,CORNEA surgery ,ENDOTHELIAL cells ,INTRAOCULAR pressure ,VISUAL perception - Abstract
Copyright of Arquivos Brasileiros de Oftalmologia is the property of Arquivos Brasileiros de Oftalmologia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2018
- Full Text
- View/download PDF
7. Impression cytologic analysis after corneal cross-linking and insertion of corneal ring segments for keratoconus: two-year results.
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RENESTO, ADIMARA DA CANDELARIA, DE NADAI BARROS, JEISON, and CAMPOS, MAURO
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CYTOLOGICAL research ,VITAMIN B2 ,KERATOCONUS ,EYE drops ,EPITHELIAL cells ,CONJUNCTIVA ,VITAMIN therapy ,THERAPEUTICS - Abstract
Copyright of Arquivos Brasileiros de Oftalmologia is the property of Arquivos Brasileiros de Oftalmologia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2012
- Full Text
- View/download PDF
8. Ten-year results of phototherapeutic keratectomy on recurrent corneal erosions.
- Author
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NASSARALLA, BELQUIZ RODRIGUES DO AMARAL and NASSARALLA JUNIOR, JOÃO JORGE
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LASER therapy ,CORNEA laser surgery ,CORNEA diseases ,EXCIMER lasers ,VISUAL acuity ,DISEASE relapse ,LASER surgery ,SURGICAL complications ,LASER ablation ,THERAPEUTICS - Abstract
Copyright of Arquivos Brasileiros de Oftalmologia is the property of Arquivos Brasileiros de Oftalmologia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2012
9. Resultados após dez anos da ceratectomia fototerapêutica para erosões recorrentes de córnea
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João Jorge Nassaralla Junior and Belquiz A Nassaralla
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Male ,Visual acuity ,Photophobia ,Córnea - cirurgia ,genetic structures ,medicine.medical_treatment ,Visual Acuity ,Corneal Diseases ,Phototherapeutic keratectomy ,Postoperative Complications ,lcsh:Ophthalmology ,Recurrence ,Medicine ,Cirurgia da córnea a laser ,Corneal epithelium ,General Medicine ,Middle Aged ,Corneal diseases/surgery ,Ceratectomia fotorrefrativa ,Photorefractive keratectomy ,Recurrent corneal erosion ,medicine.anatomical_structure ,Treatment Outcome ,Female ,Lasers, Excimer ,medicine.symptom ,Adult ,medicine.medical_specialty ,Corneal diseases ,laser/methods ,Photorefractive Keratectomy ,Córnea - doenças ,Lasers de excimer ,Ophthalmology ,Humans ,Aged ,business.industry ,Lasers ,Corneal surgery ,Corneal Topography ,excimer ,medicine.disease ,Symptomatic relief ,eye diseases ,laser ,lcsh:RE1-994 ,sense organs ,business ,Doenças da córnea ,Follow-Up Studies - Abstract
PURPOSE: To determine the ten-year visual results and outcomes of excimer laser phototherapeutic keratectomy (PTK) for recurrent corneal erosions. METHODS: Twenty-six eyes of 23 patients with recurrent corneal erosions were treated by PTK from 1996 to 2000 at the Goiania Eye Institute, Brazil. All eyes had failed to respond to conventional therapy. Data regarding preoperative and postoperative best-spectacle-corrected visual acuity (BSCVA), spherical equivalent (SE), symptomatic relief, incidence of recurrence, and complications arising from the laser treatment were analyzed. The mean duration of symptoms prior to PTK was 18 months (range, 8 to 36 months). The corneal epithelium was debrided, and laser ablation was performed to a depth of 5 micron with an ablation zone of 7 to 9 mm, using the Technolas 217C Plano Scan excimer laser. Mean postoperative follow-up was 12 years (range, 10 to 14 years). RESULTS: At the last follow-up visit, 15 eyes (57.69%) were symptomsfree. Five eyes (19.2%) had occasional mild symptoms of irritation and photophobia upon awakening. Recurrence of painful corneal erosions occurred in six eyes (23.07%), which required a PTK retreatment. Twenty-four eyes had a preserved or improved BCVA, while 2 eyes showed deterioration of 1 line on Snellen test. Eleven eyes (42.3%) had no change in SE, and the others (57.69%) had a change of less than +/-0.75 diopters (D). There were no major complications during the follow-up period. CONCLUSION: Ten-year data show that PTK is a safe, fast, effective and minimal invasive choice of treatment for recurrent corneal erosions in patients who do not respond to conventional treatments. OBJETIVO: Determinar os resultados visuais após dez anos de seguimento da ceratectomia fototerapêutica (PTK) com excimer laser para erosões recorrentes de córnea. MÉTODOS: Vinte e seis olhos de 23 pacientes portadores de erosões recorrentes de córnea foram tratados com PTK entre 1996 e 2000 no Instituto de Olhos de Goiânia, Brasil. Nenhum olho havia respondido às terapias convencionais. Dados pré-operatórios e pós-operatórios referentes à melhor acuidade visual corrigida (MAVC), equivalente esférico (EE), alívio dos sintomas, incidência de recorrência e complicações oriundas do tratamento a laser, foram analisadas. A média de duração dos sintomas antes do PTK foi de 18 meses (variando entre 8 a 36 meses). O epitélio da córnea foi debridado e a ablação realizada a uma profundidade de 5 µm e diâmetro de 7 a 9 mm, usando o excimer laser Technolas 217C Plano Scan. O seguimento médio foi de 12 anos (variando entre 10 e 14 anos). RESULTADOS: No último exame, 15 olhos (57,69%) estavam livres dos sintomas. Cinco olhos (19,2%) apresentavam sintomas, discretos e ocasionais, de irritação e fotofobia ao levantar. Recorrência de erosões dolorosas ocorreu em 6 olhos (23,07%), o que necessitou de retratamento com PTK. Vinte e quatro olhos mantiveram ou melhoraram sua MAVC, enquanto que 2 olhos perderam 1 linha de visão pela tabela de Snellen. Onze olhos (42,3%) mantiveram o mesmo EE e os outros (57,69%) apresentaram alterações inferiores a +/-0,75 dioptrias (D). Nenhuma complicação significativa foi observada durante o período de seguimento. CONCLUSÕES: Os dados de 10 anos mostram que o PTK é uma opção segura, rápida, eficaz e pouco invasiva para o tratamento de erosões recorrentes de córnea em pacientes que não respondem bem às terapias convencionais.
- Published
- 2012
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