Objetivo: Estudar a precisão do aparelho "MTI Photoscreener" na triagem de uma população infantil, identificando fatores ambliopigê-nicos como ametropias, anisometropias, estrabismos e cataratas congênitas e opacidades dos meios transparentes.Métodos: Durante o projeto "Veja Bem Brasil" os autores examinaram com uma máquina de "photoscreening" (MTI Photoscreener), 107 crianças, com idade variando entre 6 e 15 anos, comparando estes resultados com aqueles encontrados em posterior exame oftalmológico completo.Resultados: Ao final encontraram 31 (28,97%) crianças com alguma patologia oftalmológica e 76 (71,02%) dentro da normalidade. As análises estatísticas da precisão do aparelho revelaram os seguintes valores: sensibilidade 90,32%; especificidade, 96,05%; valores preditivos positivos e negativos de 90,32% e 96,05%, respectivamente.Conclusão: Os resultados acima citados demonstraram a confiabilidade do teste de "Photoscreening" na triagem de pacientes em idade escolar.
Optical coherence tomography (OCT) of the anterior segment, in particular corneal OCT, has become a reliable tool for the cornea specialist, as it provides the acquisition of digital images at high resolution with a noncontact technology. In penetrating or lamellar keratoplasties, OCT can be used to assess central corneal thickness and pachymetry maps, as well as precise measurements of deep stromal opacities, thereby guiding the surgeon to choose the best treatment option. OCT has also been used to evaluate the keratoplasty postoperative period, for early identification of possible complications, such as secondary glaucoma or donor disc detachments in endothelial keratoplasties. Intraoperatively, OCT can be used to assess stromal bed regularity and transparency in anterior lamellar surgeries, especially for those techniques in which a bare Descemet's membrane is the goal. The purpose of this paper is to review and discuss the role of OCT as a diagnostic tool in various types of keratoplasties.
Background: The principle of refractive corneal lamellar surgery rests on the modification of corneal shape after the removal of a superficial disk with a microkeratome. The 150-µm-thick disk is easily torn, rotated or decentered by the traditional eight-bite running suture, producing irregular astigmatism which is the major cause of visual deficit after these procedures.
Methods: We propose a new suture technique, designated the BRA suture, which we have used in more than 300 cases of various types of refractive corneal lamellar procedures. Based on the overlay concept, the suture is anchored in four points of the nonoperated corneal periphery.
Results: With this technique, the iatrogenic irregular astigmatism induced by the suture has been eliminated and corneal scars significantly reduced. This suture also decreases surgical time, accelerates visual recovery, and increases patient comfort due to its early removal.
Conclusions: We consider this the ideal suture for refractive corneal lamellar surgery due to its effectiveness, simplicity, and safety. (Refract Corneal Surg 1992;8:84-87.)
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