Ok. I thought when I got into a debate on a blind archer character. So here idea I come up with. I like your thoughts on it.
Cost: 10 exp / 5 exp if character has blind flaw at creation.
For attack and defense rolls, you add perception roll with all penalties.
So ((1d10+attack skill mod) + (1d10+perception skill mod))- (10 +perception penalty)
I think this talent can really help in making a blind warrior, but also allow players who willing invest in it to overcome situation where they become blind like darkness. Also I am thinking some monster should have this example like a blind cave monster.