The home page for the American Foundation for the Blind (AFB) is:
www.afb.org
If you are looking for a particular service, navigate to their home page and look for the heading:
"Where Can I Find?"
Just below that is a combo box where you can select the type of service you are looking for and then perform a search.
The home page for the Royal National Institute of Blind People (RNIB) is:
www.rnib.org.uk
Action for Blind People maintains a list of services in the UK (and is a part of RNIB Group):
www.actionforblindpeople.org.uk
The Home page for the Association for the Blind and Visually Impaired (ABVI) in Rochester, New York is:
www.seegreatthings.com
and their phone number is 585-232-1111.