A general post on many newer therapies from Scott Siskind at Astral Codex Ten: The Precision of Sensory Evidence.
One of the first
things that occurred to me about the sensory input in depression and
trauma was manics wearing sunglasses indoors. Many an argument I had
with psychodynamic therapists early in my career trying to convince me
that this was because of their narcissism and/or desire to feel
protected from being seen by others. It is one advantage of having
worked on the units at the beginning of my career, where you could see
these guys wince when they had to come out into brighter areas or they
had to take the glasses off for some reason. I was pretty sure it was a
largely physical, not psychological response. So now there is evidence that depressed people actually do see things less brightly. They are grayer.