Thus, trichromats (persons exhibiting trichromacy) can be either protanomalous, deuteranomalous
, or tritanomalous, while dichromats can be either protanopic, deuteranopic, or tritanopic.
Acceptance of these criteria particularly favours minimal/slight deuteranomalous
trichromats that would have failed the lantern test and been rejected.
A colour TV picture properly adjusted for most people may appear too green to a protanomalous (weak red) observer, or too red to a deuteranomalous
(weak green) viewer.
For example, if a deuteranomalous
trichromat apprentices under a normal trichromat, he is liable to learn to disregard what he distortedly recognizes as "red" and thereby skew his recognition process for "real red" stains as well.
No statistical analysis was done using the deuteranomalous
and protanomalous subgroups because of the small number (5) in each subgroup, but a clear trend of increasing response time with increasing severity is apparent for the deuteranomalous
participants for both R and Y signals (Figure 4).
The matching ranges of protanomalous and deuteranomalous trichromats form two separate distributions outside the normal matching range.
Similar small colour differences are employed and only minimal/slight deuteranomalous trichromats that have a discrimination threshold close to this value make fewer than eight errors.
trichromats have either two M/L chimeras or a normal L gene followed by an M/L chimera.
Hodd (81) found that the success rate was 100% for deuteranomalous
trichromats and 36% for deuteranopes; protons were not well represented in the study.
server; the protanomalous observer will need more red in the mixture whereas the deuteranomalous trichromat will need mare green (Figure 1).
Birch (17) reported that when classification was made only when the anomalous trichromat reported seeing a single digit, 47% of protanomalous trichromats and 57% of deuteranomalous trichromats were classified correctly.The efficiency of classifying anomalous trichromats increased when patients who saw both digits were asked about the relative visibility of the two figures and the one that was more visible was used to arrive at a diagnosis.
trichromat has two cone types with a photopigment spectral sensitivity peak around 560 nm (Figure 11a).