description: Sight is the ability to observe lit objects, with the goal of orienting yourself on objects and people in a lit environment. This pertains to observing the light stimuli, and not processing them in the brain.\r\nA sight disorder can lead to things including orientation problems. package_name: nictiz.fhir.nl.r4.zib2020 derivation: constraint name: ZibVisualFunctionVisualAid abstract: true type: DeviceUseStatement elements: extension: index: 0 slicing: slices: location: match: {} schema: index: 0 elements: value: choices: [] index: 2 device: type: Reference refers: ['http://hl7.org/fhir/StructureDefinition/Device', 'http://nictiz.nl/fhir/StructureDefinition/zib-VisualFunction.VisualAid.Product'] index: 3 reasonReference: index: 4 slicing: slices: stoma: match: {} schema: {index: 4} max: 0 package_version: 0.12.0-beta.3 extensions: location: url: null index: 0 elements: value: choices: [] index: 2 class: profile kind: resource url: http://nictiz.nl/fhir/StructureDefinition/zib-VisualFunction.VisualAid base: http://nictiz.nl/fhir/StructureDefinition/zib-MedicalDevice version: null