An improved photoelectric system for two-dimensional eye movement recording

Established photoelectric methods for measuring two-dimensional eye movements exist, but they suffer from a number of practical limitations, including inflexibility of the design, thermal drift, and difficulties in setting up and calibrating the system. In this paper, an improved design of transducer is described, together with a computerized method of calibration. Finally, some performance measurements are presented, showing the system to have an accuracy of a few minutes of arc.