{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:Z6MOW4H4B2BNUQTBROTSCEAFRA","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"cc4aa4bf1a5caed3e43c4c4589bcd849a633a531f36934980e67b81b70813930","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2019-06-20T15:22:44Z","title_canon_sha256":"ae0dc5c792b4e8a1460f295edb1e3cdfc59c2572340d634c6f932d4630343284"},"schema_version":"1.0","source":{"id":"1906.09149","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.09149","created_at":"2026-05-17T23:42:18Z"},{"alias_kind":"arxiv_version","alias_value":"1906.09149v2","created_at":"2026-05-17T23:42:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.09149","created_at":"2026-05-17T23:42:18Z"},{"alias_kind":"pith_short_12","alias_value":"Z6MOW4H4B2BN","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"Z6MOW4H4B2BNUQTB","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"Z6MOW4H4","created_at":"2026-05-18T12:33:33Z"}],"graph_snapshots":[{"event_id":"sha256:1422bdf8475e9903ee7c6fc0fa6345dca5e2d6ba51849ebce9ff9882a93b1649","target":"graph","created_at":"2026-05-17T23:42:18Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Purpose: To characterize the mean topographical shape of the human limbus of a normal eye and ascertain whether it depends on age and refractive power. Setting: Academic institution. Design: Prospective case series. Methods: 74 subjects aged from 20 to 84 years and with no previous ocular surgeries were included in this study. The left eye was measured four times with a corneo scleral topographer (Eye Surface Profiler). From the raw anterior eye height data of each measurement, topographical limbus was demarcated and fitted in three dimensions to a circle, an ellipse and a Fourier series. Root","authors_text":"Alejandra Consejo, Clara Llorens-Quintana, D. Robert Iskander, Hema Radhakrishnan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2019-06-20T15:22:44Z","title":"Mean shape of the human limbus"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.09149","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:a9813a97148f700735bfa555366eee1fe20eea5be260a70542a3e062c96c7737","target":"record","created_at":"2026-05-17T23:42:18Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"cc4aa4bf1a5caed3e43c4c4589bcd849a633a531f36934980e67b81b70813930","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2019-06-20T15:22:44Z","title_canon_sha256":"ae0dc5c792b4e8a1460f295edb1e3cdfc59c2572340d634c6f932d4630343284"},"schema_version":"1.0","source":{"id":"1906.09149","kind":"arxiv","version":2}},"canonical_sha256":"cf98eb70fc0e82da42618ba721100588098a06e414f1f25b94d897e27dbf2929","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cf98eb70fc0e82da42618ba721100588098a06e414f1f25b94d897e27dbf2929","first_computed_at":"2026-05-17T23:42:18.356172Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:42:18.356172Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"N3VXMDSIKuX7f1FK+xdZJOPzxOpXyh2Rmmm0fBYQg94wso5PPqCAz/B1tWEb81mkumiHXdOiucfomDZbyPFcBg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:42:18.356692Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.09149","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a9813a97148f700735bfa555366eee1fe20eea5be260a70542a3e062c96c7737","sha256:1422bdf8475e9903ee7c6fc0fa6345dca5e2d6ba51849ebce9ff9882a93b1649"],"state_sha256":"32fe39631574a1b614a11b03bba4bbaf67d585db091e50a6c373d69ac8939390"}