 These documents include:CVI Certificate of Visual ImpairmentBD8 CertificateA certificate or document issued by a Local Authority that shows they are registered as blind severely sight impairedA copy of a certificate from an Ophthalmologist eye surgeon, stating that they are blind severely sight impaired. They wont need to provide this information again when they renew their ... Thousands could qualify for a 50 discount on TV licence bill... 