'With the launch of iPhone X – the $1,000 flagship smartphone from Apple – comes a new technology called Face ID. It’s not new or unique in and of its own, but it is the first time such technology will be used in a device that’s practically an extension of our hands. Very few people actually understand how Face ID works, only being aware that it is some sort of infrared-based system that works in three dimensions.
To be clear, this is not the same technology used by Samsung for its own iris recognition feature. Some of the principles are similar, but the approaches are significantly different.
The real question is, how harmful is Face ID, considering the fact that you’re going to be using it several dozen times a day, and that it involves blasting your face and eyes with 30,000 individual streams of infrared light? Let’s see.'
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