Originally Posted by Grinnin
The brain matches complex visual input to past patterns to create a mental model that is simple enough to work with. Trying to understand all the textures of our visual input would just bog our brains down with too much detail.
In other words we see what we expect to see.
I am a strong believer in looking twice to see if I saw what I thought I saw. It's not a guarantee that I won't do what you did. I also like the triangle of light on one of my bikes -- it won't ever look like one headlight of a pair.
I read that study as well. Further into the discussion, they talked about lighting combinations that force the brain to focus rather than insert the expected.
Multi colored lights help, and so does a triangle shaped arrangement of lights. Ideally, a single white headlight, with 2 low mounted amber driving lights.