Why did the heavy pupil scare Xiao Ji like this, because it was a bit scary. The double pupils described in Huhu's text are not as simple as having two pupils in one eye, but ......

Just like the photo below, there are two eyes in one eye. Of course, the picture I found will not be as perfect as the red and juxtaposed pupils as written in the text, but I can give you a reference to think about what kind of eyes are there.

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