Also, I found this article discussing changes to the eyes function as we age.
There were a few other articles I found that discussed how certain colours of light affected certain populations of people, such as blue light intolerance and so forth. I didn't bookmark them unfortunately, but there certainly can be some physical differences to how we respond to light and how certain light can affect our vision and depth perception. But usually the percentage of affected people is less than a few percent for the range of different conditions that may exist.
I thought I'd post these so I don't lose the links, and so that others can have a read.
