That's passing strange. You do sometimes talk like you think you have expertise in this area.
... Where possible, colour should not be used as a stand-alone indicator (like in the PAPI) because all sorts of things can disrupt the signal, even for colour "normals". I agree wholeheartedly with Arthur on this one, that the T-VASIS was a much better system, as it was not reliant on normal perception of colour, and was less likely to be corrupted by atmospheric conditions/dirty lenses etc. That doesn't mean that colour coding should be removed altogether, as it provides very useful additional information.
The aviation colour environment is far more complex than a tower signal lamp or a PAPI.
And still not a syllable quoted from the "recent medical research".