In order to obtain information about eye movements in darkness including the rotatory component which cannot be recorded with electronystagmography, an infrared television apparatus was devised. The apparatus made it possible not only to observe eye movements in darkness in the same way as in light, but also to record the findings for future reference. The advantage of employing the infrared television was demonstrated by comparison between electronystagmograms and infrared television records. In the latter case, eye movements emerged as traces by frame-to-frame measurements of eye displacement on the monitor screen reproduced from the video recorder. Furthermore, measurements of ocular counterrolling in darkness were made in six normal subjects and the results obtained were compared with the counterrolling measured in light.