St. Herve is an intercessor for those with visual impairments; he himself was blind.. He was from Brittany, in France.
Here are four sites which provide information on his life:
Saints.SQPN.com http://saints.sqpn.com/saint-herve/
ChurchofCTK.org http://www.churchofctk.org/index.php/St/Harvey
http://villachicoubis.wordpress.com/2008/10/22/recits-contes-et-legendes-sur-lanimal/ (Source of image)