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: ZibVisualFunctionVisualAidProduct abstract: true type: Device elements: type: {index: 0} package_version: 0.12.0-beta.3 class: profile kind: resource url: http://nictiz.nl/fhir/StructureDefinition/zib-VisualFunction.VisualAid.Product base: http://nictiz.nl/fhir/StructureDefinition/zib-MedicalDevice.Product version: null