Does the infrared lightning from the eye tracker have a negative effect?

GazeShare
Infrared light from an eye tracker is not harmful for the human eye.
No, don’t you worry! The infrared light emission from an eye tracker is 100% secure and is not harmful to the human eye.

Your Tobii eye tracker use 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.

Since 2009 there is a European standard called EN 62471 for products using LED lights. All Tobii eye trackers have been tested and approved by certified labs according to the European standard for optical radiation hazards of different lamps and lamp systems, IEC/EN 62471. Light emission that meets this standard is not harmful to the human eye.

Interested in learning more about the European standard? Follow this link to find more information:
https://www.prlog.org/11323810-en62471-european-new-standard.html