Vergence dynamics and variability of fixation disparity in children and adults.
With dichoptic nonius lines presented repetitively on a computer monitor for only short moments in time (e.g., 80 ms), temporal aspects of vergence can be assessed: the variability of fixation disparity with a stationary central fusion stimulus and the velocity of convergence or divergence changes. Results and test-retest correlations of these psychophysical vergence measures are shown for children and adults. In most children older than about 7 years, the estimation of vergence velocity turned out as well as in adults in terms of amount and reliability.
Jaschinski
Wolfgang
W
Institut für Arbeitsphysiologie (IfADo), Dortmund, Germany. jaschinski@ifado.de
König
Mirjam
M
D000293:Adolescent; D000328:Adult; D002648:Child; D003290:Convergence, Ocular / Q000502:physiology*; D003936:Diagnosis, Computer-Assisted; D005403:Fixation, Ocular / Q000502:physiology*; D006801:Humans; D015835:Ocular Motility Disorders / Q000175:diagnosis / Q000503:physiopathology*; D015357:Vision Disparity / Q000502:physiology*; D015348:Vision, Binocular / Q000502:physiology*