assimetria na relação escavação/disco óptico em adolescentes cup-to-disc ratio asymmetry in adolescents
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2010
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Abstract
Objetivo: Verificar a frequência de assimetrias superiores a 0,2 na razão escavação/disco em uma população de adolescentes. Métodos: Retinografias de ambos os olhos de 123 jovens foram digitalizadas na resolução de 300 pixels por polegada (300 dpi), 8 bits, padrão de cor RGB. Para a realização das medidas foi utilizado o software Image J, versão 1.42, desenvolvido pelo National Institute of Health (NIH), plataforma Java versão 1.6. Resultados: Os valores das diferenças, entre os dois olhos do mesmo indivíduo, na razão das medidas do diâmetro vertical da escavação/diâmetro vertical do disco óptico variaram de 0 a 0,30. A média das diferenças foi 0,07, a mediana 0,06 e o desvio padrão 0,05. Assimetrias de até 0,06 apresentaram frequência de 54,4% e assimetrias de até 0,1 estiveram presentes em 79,7% da amostra. Dois indivíduos (1,63%) apresentaram assimetrias superiores a 0,2. Conclusão: A frequência de assimetrias no grupo de adolescentes estudado é similar à encontrada em estudos realizados com população adulta normal.
Purpose: To determine the frequency of asymmetries greater than 0.2 in the cup-to-disc ratio of a population of adolescents. Methods: Fundus photographs of both eyes of 123 adolescents were digitized at the resolution of 300 pixels per inch (300 dpi), 8 bits, with a RBG color pattern. The measurements were performed using the Image J software, version 1.42, developed by the National Institutes of Health (NIH), Java platform version 1.6. Results: The values of the differences in the cup-to-disc ratio between the two eyes of the same individual ranged from 0 to 0.30. The mean difference was 0.07, the median 0.06 and the standard deviation 0.05. About 54.4% of the studied population had asymmetries up to 0.06 and 79.7% had asymmetries up to 0.1. Two individuals presented asymmetries of more than 0.2, corresponding to 1.63% of the evaluated subjects. Conclusion: The frequency of asymmetries in the group of adolescents studied was similar to that detected in studies of the normal adult population.
Purpose: To determine the frequency of asymmetries greater than 0.2 in the cup-to-disc ratio of a population of adolescents. Methods: Fundus photographs of both eyes of 123 adolescents were digitized at the resolution of 300 pixels per inch (300 dpi), 8 bits, with a RBG color pattern. The measurements were performed using the Image J software, version 1.42, developed by the National Institutes of Health (NIH), Java platform version 1.6. Results: The values of the differences in the cup-to-disc ratio between the two eyes of the same individual ranged from 0 to 0.30. The mean difference was 0.07, the median 0.06 and the standard deviation 0.05. About 54.4% of the studied population had asymmetries up to 0.06 and 79.7% had asymmetries up to 0.1. Two individuals presented asymmetries of more than 0.2, corresponding to 1.63% of the evaluated subjects. Conclusion: The frequency of asymmetries in the group of adolescents studied was similar to that detected in studies of the normal adult population.
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campos2010arquivosassimetria
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| Authors | ;Maria Elizabete Jimenes de Campos;Denny Marcos Garcia;Maria de Lourdes Veronese Rodrigues |
| Journal | introducing innodb cluster: learning the mysql high availability stack |
| Year | 2010 |
| DOI |
10.1590/S0004-27492010000300004
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