What does 黒瞳 means?


I've came across this kanji when reading this fantasy light novel,
**黒【こく】瞳【どう】** (the furigana was also in the book), but I can't seem to find
the meaning.

I've searched for it in both english and japanese but could not find it.

I know "黒 means black" and "瞳 means pupil", So maybe I'm supposed to think
that this means "black pupil"?! But google image only shows black pupils/eyes
if I type 黒い瞳.

For context, the following line contains that word in the book (where a girl's
appearence is being described):

> 背中にかかるほど長い髪も、露出の少ない肌も目を奪われるほど白く、細い肢体を包む喪服のような漆黒のドレスと、高い知性を窺わせる
> **黒【こく】瞳【どう】** だけが、幻のように儚げな少女の実在を証明している。

From that whole line, the only thing I can't understand is 「高い知性を窺わせる黒瞳」...
**Black eyes that make you presume she's super intelligent**?




Someone who owns a huge dictionary may find an entry for it, but perhaps a
more important fact is that most Japanese speakers (including myself) do not
recognize it as a standalone word. I am aware of no reason why having black
pupils can suggest high intelligence. A quick google search gave nothing,
either. The basic meaning ("black eyes") is self-explanatory, and I think most
native speakers will read on without even wondering.




Someone who owns a huge dictionary may find an entry for it, but perhaps a
more important fact is that most Japanese speakers (including myself) do not
recognize it as a standalone word. I am aware of no reason why having black
pupils can suggest high intelligence. A quick google search gave nothing,
either. The basic meaning ("black eyes") is self-explanatory, and I think most
native speakers will read on without even wondering.

