[Color visual field to red and blue stimuli]

The boundaries of color visual field (CVF) in individuals with normal vision were studied under various signal detection criteria: natural (standard instructions), conservative (strict), and liberal (easy). The study enrolled 112 volunteers (20.40 +/- 1.45 years, M +/- SD) and was performed on an automated perimeter HFA II-750i ("Carl Zeiss Meditec, Inc."; USA) using red and blue stimuli of four discrete intensities with 10 log units increments. It was shown that blue color sensitivity reduces from the center of visual field to its periphery faster than red one. The use of the conservative criterion resulted in narrowing of CVF to both red and blue targets. With the liberal criterion applied CVF to red expands, while CVF to blue remains of the same size. Size changes of CVF are more significant when switching from the natural criterion to the conservative rather than to the liberal one.