/**
 * Eye Tracking Web Worker
 * Handles computationally intensive eye tracking calculations off the main thread
 */
interface EyeTrackingMessage {
    command: "start" | "stop" | "process";
    data?: {
        videoFrame?: ImageData;
        timestamp?: number;
    };
}
interface GazeData {
    x: number;
    y: number;
    confidence: number;
    timestamp: number;
}
declare let isTracking: boolean;
declare let processingInterval: ReturnType<typeof setInterval> | null;
declare function processEyeTracking(frame?: ImageData): GazeData;
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