Scanning laser polarimetry in glaucomatous and nonglaucomatous Brazilian subjects
PURPOSE: To compare the results of scanning laser polarimetry of the retinal nerve fiber layer obtained by using the GDx Scanning Laser System® in primary open angle glaucoma (POAG) and nonglaucomatous Brazilian subjects over 40 years, also analyzing the differences between the data obtained from ri...
| Autores: | , , |
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| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 2003 |
| País: | Brasil |
| Recursos: | Universidade Federal de São Paulo (UNIFESP) |
| Repositório: | Repositório Institucional da UNIFESP |
| Idioma: | inglês |
| OAI Identifier: | oai:repositorio.unifesp.br:11600/1931 |
| Acesso em linha: | http://dx.doi.org/10.1590/S0004-27492003000700004 http://repositorio.unifesp.br/handle/11600/1931 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Glaucoma Nerve fibers Retina Ophthalmological diagnostic technics Perimetry Fibras Nervosas Técnicas de diagnóstico oftalmológico Perimetria |
| Resumo: | PURPOSE: To compare the results of scanning laser polarimetry of the retinal nerve fiber layer obtained by using the GDx Scanning Laser System® in primary open angle glaucoma (POAG) and nonglaucomatous Brazilian subjects over 40 years, also analyzing the differences between the data obtained from right and left eyes. METHODS: Forty-six POAG patients and 44 normal subjects were enrolled in this study. Retardation data were assessed by the GDx Scanning Laser System®. The medians of the parameters printed in the result were compared in these two groups, separately in the right and left eyes, using Mann-Whitney's test. Also the frequencies of outside normal parameters and quadrants of deviation from normal graph were compared in these two groups, using chi-square or Fisher's exact test. RESULTS: All parameters obtained by GDx differed in a statistically significant way between the two groups, except symmetry for left eyes. The frequency of inferior quadrant with p<5% regarding deviation from normal graph was higher in the glaucomatous group. The most frequent outside normal limits parameters in the glaucomatous group were: maximal modulation, ellipse modulation, superior average and inferior average. All parameters except symmetry and superior/nasal differed between right and left eyes in the nonglaucomatous group. CONCLUSION: The parameters obtained by GDx are different in normal and glaucomatous subjects of that population. There are some parameters that deviate from normal values with a greater frequency in glaucomatous patients. An evident difference between the data of right and left eyes of normal subjects in this group was also observed. |
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