Here are some resources for Vision Disabilities:
WebAIM (Web accessibility in mind) for Visual Disabilities
Disabled World: Vision Disability Types and Information
Visual Impairment (for Teens) – Nemours KidsHealth
Visual Impairments Factsheet (for Schools) (for Parents) – Nemours KidsHealth
All About Vision – Resources for the visually impaired
NVISION – Organizations & Resources Supporting the Visually Impaired