Context: in a gym, a boxer attacks another boxer saying that he was provoking him with his eyes. After punching him, he thinks:

> 
> **瞳だけはぶっ飛ばねー**でやんの  
> 
>  甘ちゃんのクセに
> 
> 
> 人殴って拳が潤わなかったなんて  
> 
>  ねーのに……
> 
> 
> 

What is the meaning of the verb ぶっ飛ぶ when it refers to the eyes? Looking at its meanings in the dictionary I couldn't find one that fits the context. Is it used metaphorically here? 

Also, could you please explain the grammar behind ぶっ飛ばねーでやんの? Is it the contracted form of ぶっ飛ばないでやるの?

Thank you for your help!

**EDIT:** since it looks like a strange metaphor, I uploaded the original pages to provide more context.

[Pages where the fight starts](https://imgur.com/xYGnMHm) (here 瞳 is used with め furigana)

[Pages with the sentence in question](https://imgur.com/34KcvMk)