Facebook holds eye-tracking technology patents, but denies using them…for now

Facebook holds at least two patents to track user eye movements, but ... they use or log into Oculus, the virtual reality company they bought in 2014.

from: https://www.google.com/url?rct=j&sa=t&url=https://mashable.com/2018/06/13/facebook-track-eye-movement/&ct=ga&cd=CAIyGmIzMzRiYTExMGZiMDVhNDI6Y29tOmVuOlVT&usg=AFQjCNGsZ5dXXmSeBWnbRHa6Q2OW0yZaqA