{
  "resourceType": "ActivityDefinition",
  "id": "convergence-push-ups",
  "url": "https://bodyiq.dev/fhir/ActivityDefinition/convergence-push-ups",
  "version": "1",
  "name": "ConvergencePushUps",
  "title": "Convergence Push-Ups (Near-Far Convergence)",
  "status": "draft",
  "experimental": true,
  "description": "Hold a small near target (pencil tip, letter card) at arm's length and slowly bring it toward the bridge of the nose while keeping the target single. Use a background card to monitor physiological diplopia and detect suppression.",
  "useContext": [
    {
      "code": {
        "system": "http://terminology.hl7.org/CodeSystem/usage-context-type",
        "code": "user"
      },
      "valueCodeableConcept": {
        "text": "difficulty: beginner"
      }
    }
  ],
  "topic": [
    {
      "coding": [
        {
          "system": "https://bodyiq.dev/fhir/CodeSystem/exercise",
          "code": "convergence-push-ups",
          "display": "Convergence Push-Ups (Near-Far Convergence)"
        }
      ]
    }
  ],
  "kind": "ServiceRequest",
  "dosage": [
    {
      "text": "15 min/day, 5 days/week (CITT protocol)."
    }
  ],
  "usage": "Evidence: strong.",
  "note": [
    {
      "text": "Stop when the target doubles — that's your near point of convergence"
    },
    {
      "text": "Use a background card behind the target to see physiological diplopia of the background"
    }
  ]
}