Isn't that more of an effect of ambient darkness? Focusing on something dark doesn't affect one's pupils, as far as I know. Regardless, I've been using a dark

Isn't that more of an effect of ambient darkness? Focusing on something dark doesn't affect one's pupils, as far as I know. Regardless, I've been using a dark GitHub theme¹ and a dark Firefox theme², as well as a variety of other dark themes (e.g. Emacs tao-theme, dark terminal themes, dark Thunderbird) with no ill effects (so far)—on the other hand, my vision is not the best anyway. -- ¹ https://github.com/StylishThemes/GitHub-Dark https://github.com/StylishThemes/GitHub-Dark ² https://addons.mozilla.org/en-US/firefox/addon/ft-deepdark/ https://addons.mozilla.org/en-US/firefox/addon/ft-deepdark/