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[Aging effects on upper and lower half visual fields by VECPs and automated static perimetry].

N Sano1, E Adachi-Usami

  • 1Department of Ophthalmology, School of Medicine, Chiba University, Japan.

Nippon Ganka Gakkai Zasshi
|May 1, 1990
PubMed
Summary

Aging affects vision differently in the upper and lower visual fields. Pattern Visual Evoked Potential (P-VEP) tests reveal distinct age-related changes, particularly in the upper field, suggesting varied neural aging processes.

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Area of Science:

  • Ophthalmology and Vision Science
  • Neuroscience
  • Gerontology

Context:

  • Aging impacts visual perception, affecting both the central and peripheral visual fields.
  • Understanding age-related visual field changes is crucial for diagnosing and managing visual impairments.
  • Previous studies have not fully differentiated aging effects on the upper versus lower visual hemifields.

Purpose:

  • To investigate age-related differences in visual sensitivity and neural processing between the upper and lower visual hemifields.
  • To utilize pattern Visual Evoked Cortical Potentials (VECPs) and automated static perimetry to assess these differences.
  • To explore the role of higher neural factors in age-related visual field changes.

Summary:

  • Subjective light sensitivity decreased with age, with no significant difference between upper and lower visual fields.

Related Experiment Videos

  • Automated perimetry showed age-related declines in sensitivity across both hemifields.
  • Pattern VECPs revealed that P100 peak latency increased with age in the upper visual field, but not the lower, especially with smaller stimuli, indicating differential aging processes.

    • Impact:

    • Suggests distinct aging mechanisms in the upper and lower visual hemifields.
    • Highlights the involvement of higher neural pathways in age-related visual field alterations.
    • Provides insights for targeted interventions and understanding age-related visual decline.