Status: current, Not sufficiently defined by necessary conditions definition status (core metadata concept). Date: 31-Jul 2003. Module: SNOMED CT core
Descriptions:
| Outbound Relationships | Type | Target | Active | Characteristic | Refinability | Group | Values |
| Visual acuity test equipment (physical object) | Is a | Ophthalmological equipment | true | Inferred relationship | Some |
| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group |
| Snellen chart (physical object) | Is a | True | Visual acuity test equipment (physical object) | Inferred relationship | Some | |
| ETDRS visual acuity chart | Is a | True | Visual acuity test equipment (physical object) | Inferred relationship | Some | |
| Allen cards (physical object) | Is a | True | Visual acuity test equipment (physical object) | Inferred relationship | Some | |
| HOTV cards (physical object) | Is a | True | Visual acuity test equipment (physical object) | Inferred relationship | Some | |
| Potential acuity meter (physical object) | Is a | True | Visual acuity test equipment (physical object) | Inferred relationship | Some | |
| Laser inferometer for potential acuity testing (physical object) | Is a | True | Visual acuity test equipment (physical object) | Inferred relationship | Some | |
| Accommodative rule (physical object) | Is a | True | Visual acuity test equipment (physical object) | Inferred relationship | Some | |
| Near card (physical object) | Is a | True | Visual acuity test equipment (physical object) | Inferred relationship | Some | |
| Visual acuity chart (physical object) | Is a | True | Visual acuity test equipment (physical object) | Inferred relationship | Some |
This concept is not in any reference sets