Few days old, but didn't see it posted, so here's an interesting bit about getting your vision back if you don't mind a little animal in you 
http://cbc.ca/cgi-bin/templates/view.cgi?/news/2001/07/25/Consumers/piglens_010725
http://cbc.ca/cgi-bin/templates/view.cgi?/news/2001/07/25/Consumers/piglens_010725