How much vision do the brothers have?Updated a year ago

Their current visual acuity is approximately 20/400. They are both legally blind. Stargardt's disease generally affects the center vision while the peripheral vision remains unaffected. The retention of their peripheral vision allows the brothers to get around without visual assistance in most circumstances (for example, they don’t use a white cane or have a guide dog). Their greatest visual challenges include reading small text and recognizing faces.