1Department of Optometry and Vision Science and Vision Science Research Center, University of Alabama at Birmingham, Birmingham, Alabama
2Department of Physical Therapy, University of Alabama at Birmingham, Birmingham, Alabama *[email protected]
Supplemental Digital Content: Appendix 1, available at https://links.lww.com/OPX/A358: video eye tracking systems with 100 frame/s cameras are very common, particularly in clinical integrated vestibular/oculomotor recording systems, but are considered too slow for saccades. Sampling frequencies of less than 200 to 300 Hz cause an underestimation of saccadic peak velocity. Mack et al.15 have demonstrated that numerical oversampling can reduce this effect. In the Appendix, we analyzed the effect of 10-point oversampling of the eye position traces on the Vmax and SAT estimates.
Submitted: September 16, 2017
Accepted: June 19, 2018
Funding/Support: UAB Health Service Foundation General Endowment Fund; National Eye Institute (P30 EY-03039) Vision Science Research Center Core Grant; and Alabama Department of Commerce.
Conflict of Interest Disclosure: None of the authors have reported a financial conflict of interest.
Author Contributions and Acknowledgments: Conceptualization: CB, JBC; Data Curation: CB, JBC; Formal Analysis: CB, JBC; Funding Acquisition: CB, JBC; Investigation: CB, JBC; Methodology: CB, JBC; Project Administration: CB, JBC; Resources: CB, JBC; Software: CB; Supervision: CB, JBC; Validation: CB, JBC; Visualization: CB, JBC; Writing – Original Draft: CB, JBC; Writing – Review & Editing: CB, JBC.
The authors thank Drs. James Johnston, Katherine Weise, and Mark Swanson for their assistance as members of the UAB VOR Clinic and Dr. Kevin Schultz for the helpful discussions and review of the article.
Supplemental Digital Content: Direct URL links are provided within the text.
