To resolve the issue of no eye image and to enable the eye tracker to re-identify the examinee’s eyes, the proctor should place an arm in front of the eye tracker’s infrared lights (on both the ends of the eye tracker) and then quickly move it out of the way.
The eye tracker should reset and lock on to the examinee’s eyes. Sometimes, you may have to repeat this process. If this problem continues during the same exam, check the angle of the eye tracker as it may be greater than 22.5 degrees. If these basic troubleshooting techniques do not solve the problem, try exiting the EyeDetect software and re-launching the program. If that fails to solve the issue, restart the computer.