RESUMEN
The Standard pseudoisochromatic Plate (SPP) test was administered to 346 normals, 55 anomalous trichromats, and 46 dichromats. Its ability to detect and classify congenital color defectives was assessed. The performance of each plate was assessed separately and compared with its colorimetric properties. The test as a whole achieves a high level of accuracy in separating normals from color vision defectives [Youden's Index (YI) = 92.4%] and a high reliability (71.3%) in classification of the congenital color vision defectives. The performance of individual plates in separating color normals and color vision defectives of individual plates varies (YI ranges from 69.8 to 86.1%). A set of three plates can be chosen, which achieves a performance similar to that of the whole test. The test is found to be a reliable clinical screening method for congenital red-green color vision defectives.
Asunto(s)
Pruebas de Percepción de Colores/instrumentación , Defectos de la Visión Cromática/diagnóstico , Defectos de la Visión Cromática/congénito , Humanos , Valores de ReferenciaRESUMEN
This paper compares the performance of color defective patients on the Farnsworth Lantern test in both unlit and lit room conditions. We examined 18 dichromats and 33 anomalous trichromats, as diagnosed by the Mark I Nagel Anomaloscope. No statistically significant differences were found between their performance in the two conditions.
Asunto(s)
Pruebas de Percepción de Colores/métodos , Defectos de la Visión Cromática/fisiopatología , Iluminación , Medicina Aeroespacial , Australia , HumanosRESUMEN
The City University (TCU) test was administered to 50 dichromats and 56 anomalous trichromats. Certain poorly performing plates are identified from the accuracy of diagnosis compared with the Nagel anomaloscope and the number of dichromats passing the plates. Some plates are indicated as providing a more reliable diagnosis, particularly when used in combination. The performance of the plates is compared with their colorimetric properties. The desaturated plates, which were not part of the Mark I test, are shown not to provide the intended extent diagnosis.