Purchase this article with an account.
D. Yang, R. W. Hertle, M. Zhu; Quick Phase Analysis of the Involuntary Version-Vergence Nystagmus. Invest. Ophthalmol. Vis. Sci. 2008;49(13):134. doi: https://doi.org/.
Download citation file:
© ARVO (1962-2015); The Authors (2016-present)
To study saccade-vergence interaction we analyzed the quick phases of the involuntary version-vergence nystagmus induced by motion stimuli in the ground plane.
We displayed backward/forward motion stimuli on a monitor positioned face-up and 10 cm below the eyes. Using a search coil system, we digitized the eye movement.
It was found that the involuntary version-vergence nystagmus had both vertical version and horizontal vergence components. Backward motion induced monophasic divergent quick phases and upward versional quick phases; forward motion induced biphasic divergence-convergence quick phases and downward versional quick phases. A time dissociation of about 20 ms between version velocity peak and convergence velocity peak was observed. Linear relationships between vergence peak velocity and versional saccadic peak velocity were demonstrated.
This PDF is available to Subscribers Only