This research was conducted to develop a binocular, corneal-reflection, vertical eyemovement transducer as well as real time computer methods for measuring the optical and time differences between the two eyes in ocular tracking. Records of binocular vertical eye movements obtained on five subjects indicated that effective recording of these movements could be secured with vertically arranged photoresistors which were fitted toa pair of goggles and arranged in a bridge circuit. The magnitude of successively recorded movements within a given calibrated trial varied within a range of about 10 percent of the calibrated ranges of 2.5 and 5 degrees, thus suggesting that, under optimal conditions, the precision of recording was one of degree of better. Preliminary measurement of indicated that in binocular vertical eye motion, the two eyes are not exactly conjugate in space of in time and that they vary in time by a very small value below 0.01 second. The real-time computer and programming methods which was developed may make possible new methods and concepts of dynamic diagnosis of coordinate binocular movements.