Before revision: Head mounted displaysbring eye tracking into daily use and this raises privacy concerns for users . Privacy-preservation techniques such as differential privacy mechanisms are recently applied to the eye tracking data obtained from such displays ;
After revision: New generation head-mounted displays, such as VR and AR glasses, are coming into the market with already integrated eye tracking and are expected to enable novel ways of human-computer interaction in many applications. However, since eye movement properties contain biometric information, privacy concerns have to be handled properly . Privacy-preservation techniques such as differential privacy mechanisms are recently applied to the eye tracking data obtained from such displays ;