title: Variation of the green-red ratio with refractive error.
abstract: The relationship of refractive error to green-red ratios among color normals was investigated by asking 27 subjects to match a standard yellow with a mixture of red and green primaries using a Nagel anomaloscope. Green-red ratios did not show any regular change with refractive error. Differences in refractive error, natural or induced, among color normal persons did not change the measurements of color vision with the Nagel anomaloscope.
mesh_terms: D003118:Color Perception / Q000502:physiology*; D003119:Color Perception Tests / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D012030:Refractive Errors / Q000503:physiopathology*