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Abstract(s)
Este trabalho foi realizado com o intuito de desenvolver um estudo comparativo entre a refração objetiva com a refração subjetiva. Para tal utilizou- se o autorefratómetro Nidek 310A e o autorefratómetro Unicos URK-800. A refração subjetiva foi efetuada monocularmente através de testes optométricos convencionais e as medições objetivas foram feitas através dos autorefratómetros já referidos. Participaram no estudo 107 sujeitos, sendo excluídos os sujeitos com quaisquer patologias oculares, historial de cirurgias ou qualquer trauma que afetasse a visão, e acuidade visual inferior a unidade. Na análise estatística os valores da refração são transformados em componentes vetoriais segundo a decomposição de Fourier. Com análise gráfica de Bland-Altman, comparam-se os valores da refração subjetiva com a refração objetiva e as diferenças entre os dois autorefratómetro. Para complementar análise dos dados, as componentes vectorias são convertidas para a forma convencional esférica-cilíndrica. Os resultados obtidos mostram uma maior exatidão dos dois aparelhos na parte cilíndrica, sendo o autorefratómetro Nidek AR-310A, mais fiável que o Únicos URK-800, embora as diferenças entre os dois autorefratómetros não fosse clinicamente significativa.
This dissertation was written aiming the development of a comparative study between objective and subjective refraction. To fulfil this objective an auto refractometer Nidek AR-310A and an auto refractometer Unicos URK-800 were used. Subjective refraction was performed monocularly through conventional optometric tests, while objective refraction was performed through the previously mentioned auto refractometers. 107 subjects participated in the study, excluding any cases of subjects with ocular diseases, surgical history or any trauma that would affect vision, and visual acuity lower than 20/20. For statistical analysis purposes, refractive results were transformed in vectorial components, accordingly to Fourier decomposition. Resorting to Bland-Altman graphical analysis, objective and subjective refraction were compared and also the differences between the two instruments. Result show a greater accuracy in the two instruments at the cylindrical component level, with auto refractometer Nidek AR-310A yielding better results, although the two instruments do not display clinical significant differences.
This dissertation was written aiming the development of a comparative study between objective and subjective refraction. To fulfil this objective an auto refractometer Nidek AR-310A and an auto refractometer Unicos URK-800 were used. Subjective refraction was performed monocularly through conventional optometric tests, while objective refraction was performed through the previously mentioned auto refractometers. 107 subjects participated in the study, excluding any cases of subjects with ocular diseases, surgical history or any trauma that would affect vision, and visual acuity lower than 20/20. For statistical analysis purposes, refractive results were transformed in vectorial components, accordingly to Fourier decomposition. Resorting to Bland-Altman graphical analysis, objective and subjective refraction were compared and also the differences between the two instruments. Result show a greater accuracy in the two instruments at the cylindrical component level, with auto refractometer Nidek AR-310A yielding better results, although the two instruments do not display clinical significant differences.
Description
Keywords
Análise Gráfica de Bland-Altman Autorefratómetro Nidek Ar-310a Autorefratómetro Unicos Urk-800 Refração Objetiva Refração Subjetiva