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Evaluation of Fixational Behavior throughout Life.
Irene Altemir1,2, Adrian Alejandre3, Alvaro Fanlo-Zarazaga1,2,3
1Ophthalmology Department, Hospital Universitario Miguel Servet, 50009 Zaragoza, Spain.
Brain Sciences
|January 21, 2022
Summary
Gaze stability improves from infancy to adulthood, then declines after age 50. Eye tracking technology accurately assesses fixational behavior across all ages, providing valuable normative data.
Area of Science:
- Ophthalmology
- Neuroscience
- Human Development
Background:
- Gaze stability is crucial for visual function.
- Understanding gaze stability development across the lifespan is important.
Purpose of the Study:
- To quantify the development of gaze stability throughout life.
- To analyze gaze stability during short and long fixational tasks.
- To utilize eye tracking technology for precise measurements.
Main Methods:
- Recruited 259 participants aged 5 months to 77 years.
- Conducted ophthalmological assessments for all participants.
- Analyzed fixational behavior using the DIVE (Device for an Integral Visual Examination) eye tracking system.
Main Results:
- Gaze stability (logBCEA) improved from 5 months to 30 years, then worsened after age 50.
- Fixation duration increased with age.
- Smaller stimuli led to longer fixations, indicating influence on oculomotor performance.
Conclusions:
- Fixational behavior is accurately assessable from 5 months of age using DIVE.
- Normative data for gaze stability and fixation duration were established for all age groups.
- Advanced eye tracking technology enhances visual assessment accuracy across all ages.
