title: [Analysis of vergence functions by step stimulus].
abstract: Step responses of fusional vergence i.e. convergence and divergence were elicited by a computer-controlled phase-different haploscopic device. Eye movements of convergence and divergence were recorded by a limbus tracker. Elicited responses were analyzed using the repetitive linearization method of nonlinear curve fitting to exponential approximation. The results showed that the time constant of the exponential curve was identical between convergence and divergence. The destination of curves, i.e., the bias term of the exponential equation, always coincided with the stimulus position. These results were different from the behavior of accommodative step response which has been reported previously.
authors.forename: T
authors.initials: T
authors.lastname: Yamada
authors.forename: K
authors.initials: K
authors.lastname: Ukai
authors.forename: S
authors.initials: S
authors.lastname: Ishikawa
mesh_terms: D000328:Adult; D003290:Convergence, Ocular / Q000502:physiology; D005133:Eye Movements / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008838:Microcomputers; D009716:Numerical Analysis, Computer-Assisted; D010775:Photic Stimulation / Q000379:methods