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Related Concept Videos

Aging01:26

Aging

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Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
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Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
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Effect of aging on post-saccadic oscillations.

Diako Mardanbegi1, Rebecca Killick2, Baiqiang Xia1

  • 1School of Computing and Communications, Lancaster University, UK.

Vision Research
|December 4, 2017
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Summary

Aging significantly increases post-saccadic oscillations measured by eye trackers. This research highlights the need to consider age-related changes in eye movement dynamics for accurate data interpretation in studies using eye tracking.

Keywords:
AgingEye movementsEye trackingIrisPost-saccadic oscillation

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Area of Science:

  • Ophthalmology
  • Neuroscience
  • Human Factors Engineering

Background:

  • Eye trackers may not accurately reflect eyeball rotations, with post-saccadic movements potentially indicating relative pupil-iris motion.
  • Pupil-based, video-tracked eye movements can be influenced by iris deformation and pupil size, affecting post-saccadic oscillations.

Purpose of the Study:

  • To investigate the impact of aging on post-saccadic oscillations measured by eye trackers.
  • To determine if age-related physiological changes influence the dynamics of measured eye movements.

Main Methods:

  • Recorded eye movements in 43 young and 22 older adults using a video-based eye tracker (pupil center and corneal reflection).
  • Participants engaged in both abstract and naturalistic viewing tasks.

Main Results:

  • Significantly larger post-saccadic oscillations were observed in the older adult group compared to the younger group.
  • Aging appears to be a critical factor influencing the magnitude of post-saccadic oscillations.

Conclusions:

  • Age-related physiological changes, potentially including muscle strength, affect post-saccadic oscillations.
  • Accurate interpretation of eye movement data from eye trackers requires consideration of the aging factor.