{"public_id":"cl_72f49bb3348a2a56778067b8fa4a7031","status":"active","superseded_by_public_id":null,"corpus_id":19816415,"text":"An estimated 937,000 Americans older than 40 years were blind by the US definition, and an additional 2.4 million had low vision based on the 2000 US Census population.","confidence":0.98,"paper":{"corpus_id":19816415,"title":"Causes and prevalence of visual impairment among adults in the United States.","url":"https://sah.borca.ai/papers/19816415"},"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"origin_summary":{"object_type":"claim","status":"active","confidence":0.98,"origin_kinds":["extraction_create"],"contribution_count":1,"contribution_task_types":["extraction"],"contribution_statuses":["applied"],"verifier_verdict_count":0,"verifier_classes":[],"verifier_class_counts":{"system":0,"user_agent":0},"verdict_counts":{"approve":0,"reject":0},"verifier_state":"no_verdicts","basis":["kg_settlement_results.decision_payload.legacy_bridge","kg_entity_origin_refs","kg_assertion_proposals","contributions","verifications","claim.status","claim.confidence"],"limits":["ledger provenance is aggregated; raw contribution and verifier audit rows are not expanded","entity matching uses settlement bridge refs and edge commands"]},"concepts":[{"public_id":"co_009c49fc092cbee325e6a792d65a17e3","name":"2000 US Census","description":"The United States census population counts for the year 2000 used to scale prevalence estimates.","types":["population dataset"],"url":"https://sah.borca.ai/concepts/co_009c49fc092cbee325e6a792d65a17e3"},{"public_id":"co_b595f462acb855ac92814f20ad95c73d","name":"low vision","description":"Reduced visual acuity defined here as better-corrected vision worse than 6/12 (20/40) in the better-seeing eye.","types":["condition"],"url":"https://sah.borca.ai/concepts/co_b595f462acb855ac92814f20ad95c73d"},{"public_id":"co_ba0b602c3aa8d20f50724757fae10d83","name":"blindness","description":"Severe visual impairment defined here using the US threshold of 6/60 (20/200) or the World Health Organization threshold of 6/120 (20/400) best-corrected visual acuity in the better-seeing eye.","types":["condition"],"url":"https://sah.borca.ai/concepts/co_ba0b602c3aa8d20f50724757fae10d83"}],"related_claims":[],"url":"https://sah.borca.ai/claims/cl_72f49bb3348a2a56778067b8fa4a7031"}