The Oscar Color Vision Test

A color vision test (OSCAR), based on the “silent substitution” technique, was designed and a portable and easy‐to‐use instrument was built to carry out the test. For evaluation, a cross‐validation study was conducted on a group of 118 young men screened as possible color defectives by the Ishihara test. A battery of tests was administered including color plates, a lantern test, and the Nagel anomaloscope. The results show that OSCAR can easily screen red/green anomalous and dichromatic subjects from normals and that a protan/ deutan diagnosis can be made with a reliability comparable to that of the Nagel anomaloscope but in a much shorter time. In a test carried out on a group of 150 elementary school children the OSCAR results were comparable to the Ishihara plates and the test also proved more convenient and efficient.