A real time image based system is presented that is able to measure eye movement related quantities at high frame rate. The system's hardware component allows for high frame rate image acquisition under near infrared constant lighting conditions, whereas the software component is capable of performing real time image processing to determine the values of the required eye-related parameters. The measured quantities include blink parameters, eye-lid parameters and pupil diameter. The robustness of the proposed system is tested for different types of iris color, as well as under normal lighting conditions and near Infra-red light. The results are validated by off-line observer based inspection of the video sequences.