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Investigative Ophthalmology & Visual Science, Vol 24, 772-777, Copyright © 1983 by Association for Research in Vision and Ophthalmology

ARTICLES AND REPORTS

Identification of accommodative vergence contribution to the near response using response variance

GK Hung, JL Semmlow and KJ Ciuffreda

An experimental method was developed to isolate accommodative and disparity vergence contributions to coordinated near vergence motor responses. The variability normally associated with the neural control signal was used as an identifying marker or tag. Using this approach, the results showed an increased variability associated with the blur- driven, accommodative vergence component that is particularly noticeable during the latter half of the movement. This indicated that accommodative vergence provides a moderate contribution to the near vergence response primarily in the late and post-transient period when the movement is essentially complete. Presence of this accommodative contribution lends further support to the "dual interactive model" of near triad control.


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Copyright © 1983 by the Association for Research in Vision and Ophthalmology