{
  "subject_id": "PS",
  "session_id": "PS_20260812_092731",
  "session_tag": "desk_70cm",
  "recorded_at": "2026-08-12T09:27:31",
  "screen_diagonal_in": 31.5,
  "viewing_distance_cm": 70.0,
  "confidence_threshold": 0.9,
  "rounds": 3,
  "animation_fps": 120,
  "screen_width_px": 2560,
  "screen_height_px": 1440,
  "result_csv": "gaze_exercises_20260812_092731.csv"
}