{"record_id": "case_2000_irregularity_classification", "task_category": "mcq", "question_type": "cataract_irregularity_classification", "reward_type": "deterministic", "split": "Evaluation", "track": "cataract-1k", "video": "case_2000.mp4", "category": "Normal", "prompt": [{"role": "user", "content": [{"type": "video", "video": "case_2000.mp4"}, {"type": "text", "text": "You are given a cataract procedure video. Analyze the surgical video carefully, explain the visible intraoperative events, anatomical structures, and any observed irregularities, and then classify the case into one of the following 3 options:\n\nOptions:\nA) Normal\nB) Lens Irregularity\nC) Pupil Contraction\n\nRespond ONLY with a JSON object formatted exactly as:\n{\n  \"explanation\": \"<3-10 sentences describing the visible intraoperative evidence, anatomical findings, and rationale>\",\n  \"answer\": \"<single uppercase letter corresponding to your chosen option: A, B, or C>\"\n}\nDo not include any text outside the JSON object."}]}], "correct_answer": "A", "reference_reasoning": "The surgical video demonstrates a standard routine cataract extraction procedure with normal lens anatomy and pupil dilation, without significant lens capsule compromise or intraoperative pupil constriction.", "metadata": {"case_id": "case_2000", "category": "Normal", "source_folder": "Normal", "source_dataset": "cataract-1k", "duration_sec": 712.6, "width": 640, "height": 360, "fps": 10.0, "size_mb": 49.16, "codec": "h264", "has_audio": false, "split": "Evaluation"}}