If you haven't seen the show, here is a brief summary, pulled from Wikipedia: "The show revolves around a corporation running numerous underground establishments (known as 'Dollhouses') around the globe that program individuals referred to as Actives (or Dolls) with temporary personalities and skills. Wealthy clients hire Actives from Dollhouses at great expense for various purposes."

Matt is a Doll at the New York Dollhouse. Your choice as to whether or not he's still blind: Maybe he signed up for the Dollhouse originally because they said they could repair his sight? Fisk hires Matt to be his adversary, Daredevil. Maybe Foggy, in the years Matt has been at the Dollhouse, became a successful lawyer, and hires Matt to be his old friend, secretly planning to break him out.