Crazy idea in this space. Eye-tracking will eventually be standard on consumer VR headsets that can be had for $300. As someone following the industry closely, I believe that the Oculus Quest 4 or a device like it will certainly have eye-tracking support. Obviously if one were to take their test in a VR environment with their eye-movements tracked it would be almost impossible to cheat. Eyes also provide a good biometric identifier. Mirrors, screens, exploits, etc can be foiled using software locks, HMDs cameras and imu data. Of course I'm not advocating a testing system like this, but it would put a hard stop to cheating on synchronous exams, enforce some level of standardization, and should be accessible to every student in the 1st world. Understandable privacy and ethics issues with something like this. It is probably better to address why people cheat in the first place and make education less reliant on exams. (continuous low-impact variable feedback vs discrete high-impact fixed feedback)