Phase 2 In the second phase, the amended version of the Functional Outcome Instrument will be administered to individuals with VFD. Two groups will be studied: 100 cases which will perform Vision Restoration Therapy (VRT), and 50 controls that will not. The latter group will include the 20 patients with VFD studied in Phase 1. Both groups will undergo visual field testing with high resolution perimetry, and will complete the Functional Outcome Measure on 4 occasions: twice within a 2 week interval at baseline, once after three months, and once after 6-7 months, with one of the groups having completed therapy during this time.