Correction of Saccade-Induced Midline Errors in Responses to Pure Disparity Vergence Stimuli.
Purely symmetrical vergence stimuli aligned along the midline (cyclopean axis) require only a pure vergence response. Yet, in most responses saccades are observed and these saccades must either produce an error in the desired midline response or correct an error produced by asymmetry in the vergence...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2009-02-01
|
| Series: | Journal of Eye Movement Research |
| Subjects: | |
| Online Access: | https://bop.unibe.ch/JEMR/article/view/2280 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850146241039564800 |
|---|---|
| author | John L. Semmlow Yung-Fu Chen Bérangère Granger-Donnetti Tara L. Alvarez |
| author_facet | John L. Semmlow Yung-Fu Chen Bérangère Granger-Donnetti Tara L. Alvarez |
| author_sort | John L. Semmlow |
| collection | DOAJ |
| description | Purely symmetrical vergence stimuli aligned along the midline (cyclopean axis) require only a pure vergence response. Yet, in most responses saccades are observed and these saccades must either produce an error in the desired midline response or correct an error produced by asymmetry in the vergence response. A previous study (Semmlow, et al. 2008) has shown that the first saccade to appear in a response to a pure vergence stimulus usually increased the deviation from the midline, although all subjects (N = 12) had some responses where the initial saccade corrected a vergence induced midline error. This study focuses on those responses where the initial saccade produces an increased midline deviation and the resultant compensation that ultimately brings the eyes to the correct binocular position. This correction is accomplished by a higher level compensatory mechanism that uses offsetting asymmetrical vergence and/or corrective saccades. While responses consist of a mixture of the two compensatory mechanisms, the dominant mechanism is subject-dependent. Since fixation errors are quite small (minutes of arc), some feedback controlled physiological process involving smooth eye movements, and possibly saccades, must move the eyes to reduce binocular error to fixation disparity levels. |
| format | Article |
| id | doaj-art-c059f3e0529944aba8732a7273b59cac |
| institution | OA Journals |
| issn | 1995-8692 |
| language | English |
| publishDate | 2009-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Eye Movement Research |
| spelling | doaj-art-c059f3e0529944aba8732a7273b59cac2025-08-20T02:27:54ZengMDPI AGJournal of Eye Movement Research1995-86922009-02-012510.16910/jemr.2.5.1Correction of Saccade-Induced Midline Errors in Responses to Pure Disparity Vergence Stimuli.John L. Semmlow0Yung-Fu Chen1Bérangère Granger-Donnetti2Tara L. Alvarez3Robert Wood Johnson Medical School, University of Medicine and Dentistry of New Jersey (UMDNJ), New Brunswick, New Jersey USA, Rutgers University, Piscataway, New Jersey USADepartment of Computer Science and Information Engineering, Dayeh University, Changhua, TaiwanEssilor International, St. Maur, FRANCEDepartment of Biomedical Engineering, New Jersey Institute of Technology (NJIT), Newark, New Jersey, USAPurely symmetrical vergence stimuli aligned along the midline (cyclopean axis) require only a pure vergence response. Yet, in most responses saccades are observed and these saccades must either produce an error in the desired midline response or correct an error produced by asymmetry in the vergence response. A previous study (Semmlow, et al. 2008) has shown that the first saccade to appear in a response to a pure vergence stimulus usually increased the deviation from the midline, although all subjects (N = 12) had some responses where the initial saccade corrected a vergence induced midline error. This study focuses on those responses where the initial saccade produces an increased midline deviation and the resultant compensation that ultimately brings the eyes to the correct binocular position. This correction is accomplished by a higher level compensatory mechanism that uses offsetting asymmetrical vergence and/or corrective saccades. While responses consist of a mixture of the two compensatory mechanisms, the dominant mechanism is subject-dependent. Since fixation errors are quite small (minutes of arc), some feedback controlled physiological process involving smooth eye movements, and possibly saccades, must move the eyes to reduce binocular error to fixation disparity levels.https://bop.unibe.ch/JEMR/article/view/2280vergencesaccadeoculomotor controlbinocularitysaccade-vergence interaction |
| spellingShingle | John L. Semmlow Yung-Fu Chen Bérangère Granger-Donnetti Tara L. Alvarez Correction of Saccade-Induced Midline Errors in Responses to Pure Disparity Vergence Stimuli. Journal of Eye Movement Research vergence saccade oculomotor control binocularity saccade-vergence interaction |
| title | Correction of Saccade-Induced Midline Errors in Responses to Pure Disparity Vergence Stimuli. |
| title_full | Correction of Saccade-Induced Midline Errors in Responses to Pure Disparity Vergence Stimuli. |
| title_fullStr | Correction of Saccade-Induced Midline Errors in Responses to Pure Disparity Vergence Stimuli. |
| title_full_unstemmed | Correction of Saccade-Induced Midline Errors in Responses to Pure Disparity Vergence Stimuli. |
| title_short | Correction of Saccade-Induced Midline Errors in Responses to Pure Disparity Vergence Stimuli. |
| title_sort | correction of saccade induced midline errors in responses to pure disparity vergence stimuli |
| topic | vergence saccade oculomotor control binocularity saccade-vergence interaction |
| url | https://bop.unibe.ch/JEMR/article/view/2280 |
| work_keys_str_mv | AT johnlsemmlow correctionofsaccadeinducedmidlineerrorsinresponsestopuredisparityvergencestimuli AT yungfuchen correctionofsaccadeinducedmidlineerrorsinresponsestopuredisparityvergencestimuli AT berangeregrangerdonnetti correctionofsaccadeinducedmidlineerrorsinresponsestopuredisparityvergencestimuli AT taralalvarez correctionofsaccadeinducedmidlineerrorsinresponsestopuredisparityvergencestimuli |