It's a whole series with a focus on Matt's senses, but there's some pretty great Foggy & Matt friendship bits in there related to how Foggy learns about/deals with Matt's heightened senses throughout their friendship. It also hits the note you mentioned about Matt's blindness being frustrating for him and times when his other senses don't really make up for it.
Re: Fic Recs thread (unsolicited recs, requests, etc.)
http://archiveofourown.org/series/251434
It's a whole series with a focus on Matt's senses, but there's some pretty great Foggy & Matt friendship bits in there related to how Foggy learns about/deals with Matt's heightened senses throughout their friendship. It also hits the note you mentioned about Matt's blindness being frustrating for him and times when his other senses don't really make up for it.