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Deep learning-enabled prediction of surgical errors during cataract surgery: from simulation to real-world application

Real-time prediction of technical errors from cataract surgical videos can be highly beneficial, particularly for telementoring, which involves remote guidance and mentoring through digital platforms. However, the rarity of surgical errors makes their detection and analysis challenging using artificial intelligence. To tackle this issue, we leveraged videos from the EyeSi Surgical cataract surgery simulator to learn to predict errors and transfer the acquired knowledge to real-world surgical contexts. By employing deep learning models, we demonstrated the feasibility of making real-time predictions using simulator data with a very short temporal history, enabling on-the-fly computations. We then transferred these insights to real-world settings through unsupervised domain adaptation, without relying on labeled videos from real surgeries for training, which are limited. This was achieved by aligning video clips from the simulator with real-world footage and pre-training the models using pretext tasks on both simulated and real surgical data. For a 1-second prediction window on the simulator, we achieved an overall AUC of 0.820 for error prediction using 600$\times$600 pixel images, and 0.784 using smaller 299$\times$299 pixel images. In real-world settings, we obtained an AUC of up to 0.663 with domain adaptation, marking an improvement over direct model application without adaptation, which yielded an AUC of 0.578. To our knowledge, this is the first work to address the tasks of learning surgical error prediction on a simulator using video data only and transferring this knowledge to real-world cataract surgery.

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