Under moderate to high luminance conditions, the rod cells are fully saturated and our visual systems switch from a rod to a cone view (trichromat
; photopic view).
4 Assessment of the ability of a colour deficient person to complete the most safety critical task with the same accuracy as a normal trichromat
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.
The three dimensions of the colour space of a trichromat
correspond with the possibility of finding an additive mixture of three well chosen coloured lights, for example a red, a blue and a yellow (three 'primaries'), to match (for the particular animal) the colour of any light.
Despite the appeal of these arguments, the tens wearer and anomalous trichromat
cases seem to give empirical reason to believe the arguments are deficient.
Filters that change a daltonian's performance on a particular test or task, from that typical without a filter to that of a normal trichromat
, have been determined theoretically and some have been tested.
(13) The anomalous trichromat
will need a different proportion of red and green lights to match the yellow than the normal ob.
Since the spectral luminosity function is the sum of the L- and M-cone spectral sensitivities, a protanope's spectral luminosity function peaks at a lower wavelength than that of a normal trichromat
and shows reduced sensitivity to long wavelength light.
We chose the one-tailed analysis because the perfect result that is expected for normal trichromats
(control) is 1 and worsening of the performance would only increase the outcome.
(persons exhibiting trichromacy) can be either protanomalous, deuteranomalous, or tritanomalous, while dichromats can be either protanopic, deuteranopic, or tritanopic.
The experimental gene therapy for color blindness aim to convert congenitally color blind individuals to trichromats
. In gene therapy a functional copy of gene is introduced into the patient's own cell, it is able to produce normal proteins which have potential to correct the underlying cause of disease18.
Smith, "Full-spectrum cone sensitivity functions for X-chromosome-linked anomalous trichromats
," Journal of the Optical Society of America A, vol.