[Solved] Persona Eye Tracking and Facial Expressions Drift on Apple Vision Pro 512GB: How to resolve Spatial infrared sensor array calibration drift and thermal gradient near TrueDepth module

[Douglas Krause]

Diagnostic Hardware Specs: Apple Vision Pro 512GB | OS Version: visionOS 2.1 | Archive Source: Apple Support Community #256506469

I am running into a persistent issue on my Apple Vision Pro 512GB running visionOS 2.1.
Whenever the machine encounters Spatial infrared sensor array calibration drift and thermal gradient near TrueDepth module, the following diagnostic log appears in Console:

SpatialBiometrics: [EyeTracking] Tracking confidence dropped below 0.65 - recalibration prompt triggered at delta T=6K

I verified that hardware connections are intact and tested across different power sources. What is the verified diagnostic procedure to permanently eliminate this symptom?

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[Lauren Scott]

Apple Recommended / Verified Community Solution

This canonical solution was verified and marked as solved in the Apple Support Community archive.

Re-calibrating eye tracking geometry, re-capturing Spatial Persona, and ensuring proper Light Seal seal.

Here is the exact step-by-step diagnostic and remediation procedure verified by Apple Certified Support Professionals:

1. Remove Light Seal and inspect internal infrared illuminator lenses; clean gently with Apple microfiber cloth.
2. Navigate to Settings > Eyes & Hands and select Recalibrate Eye Tracking.
3. Follow the multi-dot gaze target calibration keeping your head perfectly stationary until three confirmation chimes sound.

Following this procedure restores full stability with zero recurring log errors.

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