Look at her amused

Hi, thanks for viewing this post.

I often see sentences like “He looked at her amused.”

What kind of grammar structure is this? Is the word amused describing he or she?

Thanks!

He looked at her in an amused way.
It describes the look.

There should be a comma before ‘amused’.
He looked at her, amused.

Oh, that explains it.

Thank you very much!