{
  "resourceType": "ActivityDefinition",
  "id": "optokinetic-stimulation",
  "url": "https://bodyiq.dev/fhir/ActivityDefinition/optokinetic-stimulation",
  "version": "1",
  "name": "OptokineticStimulation",
  "title": "Optokinetic Stimulation",
  "status": "draft",
  "experimental": true,
  "description": "Brief exposure to repetitive moving visual patterns (optokinetic discs, scrolling text videos, busy environment footage) to habituate visual-vestibular conflict symptoms.",
  "useContext": [
    {
      "code": {
        "system": "http://terminology.hl7.org/CodeSystem/usage-context-type",
        "code": "user"
      },
      "valueCodeableConcept": {
        "text": "difficulty: intermediate"
      }
    }
  ],
  "topic": [
    {
      "coding": [
        {
          "system": "https://bodyiq.dev/fhir/CodeSystem/exercise",
          "code": "optokinetic-stimulation",
          "display": "Optokinetic Stimulation"
        }
      ]
    }
  ],
  "kind": "ServiceRequest",
  "dosage": [
    {
      "text": "30 s–2 min per session, 1–2×/day, increase as tolerated."
    }
  ],
  "usage": "Evidence: strong.",
  "note": [
    {
      "text": "Start with 30 s. Stop if symptoms exceed mild — they should subside within a minute"
    },
    {
      "text": "Stand near a wall if upright — visual flow can perturb balance"
    }
  ]
}