title: A new portable visual aid for the partially sighted.
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D010781:Photography / Q000295:instrumentation*; D011932:Reading; D012682:Sensory Aids / Q000592:standards*; D014786:Vision Disorders / Q000628:therapy*