But there are several variables here that we don’t know about. For example, Apple has not revealed the intensity of infrared light that is beamed out by the Dot Projector; nor has it given us any kind of clue as to the real risks involved when using Face ID. It’s also possible that Apple lacks the research data to say whether or not it is safe.
One thing is clear: the risks are definitely there. Infrared is known to cause retinal and corneal damage, especially when IR-A is used, which is the closest to visible light. Though there is no conclusive evidence to suggest that Face ID can cause any of these issues, there is also no evidence to show that it cannot cause them.
And that’s the hard truth that iPhone X owners are going to have to live with.