Re: Changes for emacs 28

[Dmitry Gutov]

On 07.09.2020 11:38, Ricardo Wurmus wrote:
> https://www.nature.com/articles/s41598-018-28904-x
>
>    “We found that reading dark text on bright background reduces
> choroidal thickness in one hour, while reading bright text on dark
> background increases the thickness of the choroid. Since choroidal
> thickness changes are precursors for future changes in eye growth, we
> expect that there will be selective effects on subsequent myopia
> development.”

I wouldn't take this at face value. First, the big "conclusion" in there 
is based on conjecture, we don't know the underlying choroid <-> myopia 
mechanism, and whether it's causation or correlation.

Second, the example dark-on-light color choice in the article (Figure 1) 
is obviously terrible and low-contrast. I wouldn't recommend anyone to 
use it.

Third, and this is of course anecdotal, I had an episode in my 
mid-twenties where I started having problems with vision (blurriness, 
low perception in the dark, etc), and it only got better when I made 
sure to use good, strong lighting everywhere, good contrast screens, 
etc, which is the predominant ergonomic advice these days. 10 years 
later, my vision is 20/20.

Another advice from the same category is that the brightness and 
contrast levels of your screen should match the rest of the room, and 
more specifically, the room (or wall) behind the screen. So dark themes 
have their uses, of course (for reading in the dark: on the phone in the 
evening outside; on the airplane; etc). But I'm quite sure defaulting to 
a light theme for general work is still better for most people.