Validação clínica de teste psicofísico computadorizado para avaliação de visão de cores e sensibilidade ao contraste
Purpose: To determine the reliability of TwoDocs compu-terized test for the evaluation of color vision and contrast sensitivity in normal adults. Methods: Thirty normal volunteers aged from 20 to 30 years (mean 23.3 years) had their color vision and contrast sensitivity tested by a new computerized...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2000 |
| País: | Brasil |
| Institución: | Universidade Federal de São Paulo (UNIFESP) |
| Repositorio: | Repositório Institucional da UNIFESP |
| Idioma: | portugués |
| OAI Identifier: | oai:repositorio.unifesp.br:11600/982 |
| Acceso en línea: | http://dx.doi.org/10.1590/S0004-27492000000300004 http://repositorio.unifesp.br/handle/11600/982 |
| Access Level: | acceso abierto |
| Palabra clave: | Color vision Contrast sensitivity Clinical assessment Visão de cores Sensibilidade ao contraste Avaliação clínica |
| Sumario: | Purpose: To determine the reliability of TwoDocs compu-terized test for the evaluation of color vision and contrast sensitivity in normal adults. Methods: Thirty normal volunteers aged from 20 to 30 years (mean 23.3 years) had their color vision and contrast sensitivity tested by a new computerized test (TwoDocs test). Informed consent was obtained from all participants before testing. Inclusion criteria were: absence of visual com-plaints, absence of previous ophthalmic surgery, absence of family history of ophthalmologic diseases, best corrected visual acuity for near and distance of 20/20. Tests with the Farnsworth-Munsell 100-hue (FM-100) test for color vision assessment and the Pelli-Robson chart for contrast sensitivity measurement were also performed on the same visit, and both were considered gold standards for clinical validation. Results: The results of contrast sensitivity obtained with the Pelli-Robson chart and TwoDocs test showed agreement of 100%. Color vision results obtained with the TwoDocs test showed a strong trend to overestimate color vision classification when compared with FM-100. Conclusion: The new computerized psychophysical TwoDocs test showed a high sensitivity and specificity for contrast sensitivity measurement and can be a useful clinical tool in ophthalmology practice for this visual task. Color vision classification obtained with the TwoDocs test showed a low specificity when compared with FM-100. One possible reason for this overestimation is the computer monitor used to generate the color pattern. Additional studies in patients with disorders in color vision should be done for understan-ding the usefulness of this method better in clinical color vision assessment. |
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