While uneven_eyes has established itself, it still doesn't sound too good for me.
Would asymmetrical_eyes work better for us? It'd still be the same definition as above, with exception to eye colors and the pupils/irises, the latter then falling under asymmetrical_pupils (to match constricted_pupils).
Then there's a matter of eyebrows. Searching tags for *_eyebrow* gives raised_eyebrow as the most populated position-relevant tag, but there's also raised_eyebrows, cocked_eyebrow, and a lone case of furrowed_eyebrows.
I'd like to see an asymmetrical_eyebrows tag. For one, it could be used in combination (or exclusion) with raised_eyebrow/s, so we could separate, say, inquisitive looks from surprised ones. Aside from aliasing and implicating, furrowed_eyebrows seems like a tag with promise, but how should it be defined? Just with the inner ends downward (>:)), or upward, too (that sad, pathetic look)? And cocked_eyebrow, I've used for that inquisitive look, but it could just get shuffled into raised_eyebrow, if that doesn't get aliased somehow.
...Does this jumbled can of worms catch anyone's interest, here?
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