Navegando por Palavras-chave "Estroma corneal"

Agora exibindo 1 - 2 de 2
  • Imagem de Miniatura
    Item
    Acesso aberto (Open Access)
    Análise das alterações na curvatura corneana com implante intra-estromal: estudo experimental em coelhos
    (Conselho Brasileiro de Oftalmologia, 2007-03-01) Godoy, Cinara Sakuma De Oliveira; Wahab, Samia Ali; Moreira, Hamilton [UNIFESP]; Moreira, Luciane Bugman; Godoy, Glaucio De [UNIFESP]; Universidade Federal do Paraná; UFPR; Universidade Federal de São Paulo (UNIFESP); Faculdade Evangélica do Paraná; Hospital de Olhos do Paraná
    PURPOSE: To evaluate the effect of intrastromal corneal ring implantation on corneal curvature in rabbits. METHODS: Thirty eyes of 15 rabbits were divided into two groups: group 1 with 7 animals and group 2 with 8 animals. The left eye underwent surgery and the right eye was used as control. Ultrasound pachymetry and corneal topography were performed prior to surgery. Anterior segment biomicroscopy and corneal topography were performed after surgery. In group 1, implantation of two ring segments was performed. In group 2, ring segments were implanted separately. Topographical findings, before and after surgery, were compared through quantitative and qualitative alterations and divided into four quadrants. RESULTS: Quantitative analysis showed no significant difference between the groups in the preoperative period. Experiment group 1 showed nasal (p=0.02) and temporal (p=0.04) corneal steepening, compared to control group 1. Experiment group 2 showed nasal and temporal corneal steepening and superior and inferior corneal flattening (p=0.02 for all quadrants) compared to the control group 2. Qualitative analysis showed uniform astigmatism in both control groups. In experiment group 1, against-the-rule regular symmetrical astigmatism was observed after surgery. In experiment group 2, against-the-rule regular asymmetrical astigmatism was found after implantation of the first ring segment, and against the rule regular symmetrical astigmatism was observed after implantation of the second segment. CONCLUSION: In this study, significant corneal flattening occurred in quadrants where ring segments extremities were located and corneal steepening was observed in quadrants where its body was located. Implantation of one ring segment induces asymmetrical astigmatism.
  • Imagem de Miniatura
    Item
    Acesso aberto (Open Access)
    Distrofia corneana amorfa posterior: relato de caso
    (Conselho Brasileiro de Oftalmologia, 2006-12-01) Oliveira, Lauro Augusto de [UNIFESP]; Vieira, Luiz Antônio [UNIFESP]; Freitas, Denise de [UNIFESP]; Sousa, Luciene Barbosa de [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    The purpose of this paper is to warn the ophthalmologist about the possibility of facing rare cases of corneal dystrophies. Clinical findings of a case of posterior amorphous dystrophy were correlated with refraction, topography, and ultrasound biomicroscopy.