Each state has a federally-funded State Deaf-Blind project to help families and educators to provide services for children (0-21) who are deaf-blind. The National Center on DeafBlindness works with all of these state projects and is a good place to start to learn about resource and to find your state project.
Many states have a group for families with an individual who is deafblind. These groups typically provide information and support to families within that state. Several of these family groups are also NFADB Affiliates.
Check with your state deaf-blind project to find out if your state has a parent group.
The Hayes Research Library has a comprehensive collection of materials about deafblindness and multiple disabilities that include visual impairment. The collection focuses on non-medical resources for teachers, practitioners, schools, families, and communities.