J Korean Ophthalmol Soc.
1979 Jun;20(2):145-152.
The Studieg on Vertical Eye Movement Disorders: Vertical Saccadic Velocity Measurements
- Affiliations
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- 1Department of OphthaImolgy, Yonsei UniversIty College of Medicine, Seoul, Korea.
- 2Department of Electrical Engineering, Kun Kuk University Seoul, Korea.
Abstract
- This study is concerned with human vertical saccadic systam to various visual stimulus. A system is described fer the recording and analysis of corrective movements and the angular velocities asscciated with 10 degrees and 20degrees vertical saccades. Recordings wsre made with photoelectric IR reflection method and the saccades were induced by a target system which operates on non-predictable manner. Statistical results for average peak veIomnes of right eye are given for a group of 4 normal subjects and compared with horizontal saccades. Most of corrective movements were categorized to saccadic and glissadic and magnitude of corrective errors were within 1 degree and 2 degrees and showed 20% production rate. The peak velccity statistics showed as 280 and 440 deg/s associated with 10 degrees and 20 degrees vertical movement and downward values were slightly faster than upward movements. Our results were compared with horizontal saccades and discussed the possibility of research and clinical tool that could be used on a large number and variety of patients.
