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Why can there be issues with eye tracking with interference from the sun and some other types of light sources?

June 02, 2020

Tobii Eye Tracking devices are using near-infrared illumination to create reflections on the eyes that can be tracked with high accuracy. Near-infrared light can be found in our natural environment, for instance in candle lights, fires, and in the sun where the IR light is invisible or viewed as white light.