Fator de correção para indivíduos com capacidade acomodativa baseado no uso do refrator automático
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Data
2009-12-01
Autores
Takahagi, Rodrigo Ueno
Lavagnoli, Andréia [UNESP]
Fernandes, Tatiana Moura [UNESP]
Schelinni, Silvana Artioli [UNESP]
Padovani, Carlos Roberto [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Conselho Brasileiro de Oftalmologia
Resumo
OBJETIVO: Pesquisar um fator de correção para avaliação do erro refrativo sem a utilização da cicloplegia. MÉTODOS: Foram estudados 623 pacientes (1.246 olhos), de ambos os sexos, com idade entre 3 e 40 anos. As refratometrias estática e dinâmica foram obtidas usando-se o refrator automático Shin-Nippon Accuref-K 9001. A cicloplegia foi obtida com a instilação de uma gota de colírio ciclopentolato a 1%, com refratometria estática 30 minutos após. Os dados foram submetidos à análise estatística usando a técnica do modelo de regressão linear e modelo de regressão múltipla do valor dióptrico com e sem cicloplegia, em função da idade. RESULTADOS: A correlação entre valores dióptricos sem e com cicloplegia quanto ao erro astigmático variou de 81,52% a 92,27%. Quanto ao valor dióptrico esférico, a correlação foi menor (53,57% a 87,78%). O mesmo se observou em relação ao eixo do astigmatismo (28,86% a 58,80%). O modelo de regressão múltipla em função da idade mostrou coeficiente de determinação múltiplo maior para a miopia (86,38%) e astigmatismo (79,79%). O menor coeficiente foi observado para o eixo do astigmatismo (17,70%). CONCLUSÃO: Avaliando-se os erros refrativos com e sem cicloplegia, observou-se alta correlação nas ametropias cilíndricas. Foram desenvolvidas equações matemáticas como fator de correção para refratometrias dos pacientes sem cicloplegia, portadores de ametropias cilíndricas e esféricas.
PURPOSE: To determine a correction factor for refractive errors evaluated without cycloplegy effect. METHODS: A study was made with 623 patients (1,246 eyes) of both sexes, aging between 3 and 40 years old. The dynamic and static refractometries were obtained using the automated refractor Shin-Nippon Accuref-K 9001. 1% Cyclopentolate was dropped and the static refractometry was performed in 30 minutes. Data were analyzed using the linear regression model and the multiple regression model of the diopter values with and without cycloplegy effect according to age. RESULTS: The correlation between the astigmatism diopter values with and without cicloplegy ranged from 81.52% to 92.27%. Analyzing the spherical diopter values, the correlation was lower (53.57% to 87.78%). The astigmatism axis also revealed low correlation values (28.86% to 58.80%). The multiple regression model according to age demonstrated multiple determination coefficient with high values for myopia (86.38%) and astigmatism (79.79%). The lowest multiple determination coefficient was observed for astigmatism axis (17.70%). CONCLUSION: It was possible to demonstrate a high correlation in refractive errors with and without cycloplegy effect on the cylindrical ametropies. Mathematical formules, for cylindrical and spherical ametropies, were presented as a correction factor for refraction of the patients not submitted to cycloplegy.
PURPOSE: To determine a correction factor for refractive errors evaluated without cycloplegy effect. METHODS: A study was made with 623 patients (1,246 eyes) of both sexes, aging between 3 and 40 years old. The dynamic and static refractometries were obtained using the automated refractor Shin-Nippon Accuref-K 9001. 1% Cyclopentolate was dropped and the static refractometry was performed in 30 minutes. Data were analyzed using the linear regression model and the multiple regression model of the diopter values with and without cycloplegy effect according to age. RESULTS: The correlation between the astigmatism diopter values with and without cicloplegy ranged from 81.52% to 92.27%. Analyzing the spherical diopter values, the correlation was lower (53.57% to 87.78%). The astigmatism axis also revealed low correlation values (28.86% to 58.80%). The multiple regression model according to age demonstrated multiple determination coefficient with high values for myopia (86.38%) and astigmatism (79.79%). The lowest multiple determination coefficient was observed for astigmatism axis (17.70%). CONCLUSION: It was possible to demonstrate a high correlation in refractive errors with and without cycloplegy effect on the cylindrical ametropies. Mathematical formules, for cylindrical and spherical ametropies, were presented as a correction factor for refraction of the patients not submitted to cycloplegy.
Descrição
Palavras-chave
Erros de refração, Acomodação ocular, Miopia, Hipermetropia, Astigmatismo, Refraction errors, Ocular accommodation, Myopia, Hyperopia, Astigmatism
Como citar
Arquivos Brasileiros de Oftalmologia. Conselho Brasileiro de Oftalmologia, v. 72, n. 6, p. 789-792, 2009.