When I had my wisdom teeth out in 1989, for pre-surgery I was put in a room with another young man that was having his out. At the time I weighed about 160 and the other kid weighed about 100lbs more than me.
The doctor came in and told me it would take a lot to put me out because I was a redhead. I thought he was joking but after the surgery he told me it took twice the anesthesia to put me out as that other kid that weighed 100lbs more than me.
There is research that backs that up. So I’m not saying there is anything to this night vision thing, but there are unexpected correlations between genetic traits and things one would not expect.
Red heads hard to knock out. Noted :-)
I do think the idea that eye color and light sensitivity are associated is a viable hypothesis, that's why I'm following to see if there's any evidence.
I have a hypothesis about color vision and visual sensitivity in low light conditions.
My guess is that men with poor color vision may have a trade-off where they aren't good at differentiating colors, but they are good at spotting and tracking objects in low light conditions.
I'm speculating that this may have evolved to increase the ability to spot prey in low light conditions, which would have been especially useful for those looking for a tasty bunny rabbit in the depths of winter in northern regions.
Eye color may be another association. . .
It would be a fun hypothesis to test, and I will probably get around to it one of these days.
Another interesting aspect, is tetrachromacy. About 12% of women have four cone cells, and can differentiate colors like crazy. They weren't discovered until they could be given tests sufficiently difficult.
There's a genetic association in there where I think the tetrachromatic females are likely to have color blind fathers.
My bet is that this is an interesting genetic complementarity where the females are specializing for detecting differences between edible and dangerous foods (say mushroom and various plants), whereas the males are specializing for detecting those bunny rabbits.