R] values below one for real deuteranopes (they see the pseudoachromatic greens darker).
R] values similar to those provided by real protanopes but not by real deuteranopes.
The results show that deuteranopes are less likely to notice road traffic control devices than are observers with normal color vision, with the exception of yellow warning signs and blue parking signs, which have the same conspicuity for both observer groups.
However, deuteranopes perceive any red color in road signs as dark yellow.
This is also an explainable result: Deuteranopes see green as grey, or as a grey with a yellowish tinge.
Deuteranopes made significantly more errors than did any other group (p .
For example, our deuteranopes showed the greatest increases in response time--53% for R signals and 85% for Y signals, relative to those of normals--whereas protanopes showed increases in response times of 35% for R signals and 53% for Y signals.
22) All deuteranopes and 96% of protanopes failed the test.
1) Mean position of the center cap Range Protanopes 17 15-26 64 58-68 Deuteranopes 15 12-17 58 53-60 Tritanopes 5 4-6 45.