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Related Experiment Videos

Seeing into old age: vision function beyond acuity.

G Haegerstrom-Portnoy1, M E Schneck, J A Brabyn

  • 1The Smith-Kettlewell Eye Research Institute, San Francisco, California 94115, USA.

Optometry and Vision Science : Official Publication of the American Academy of Optometry
|April 23, 1999
PubMed
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Vision declines significantly beyond standard acuity in older adults, especially in low light or glare. This impacts daily life, highlighting the need for broader vision assessments in aging populations.

Area of Science:

  • Ophthalmology
  • Gerontology
  • Vision Science

Background:

  • Age-related vision changes often extend beyond simple visual acuity.
  • Assessing comprehensive visual function is crucial for understanding daily life challenges in older adults.

Purpose of the Study:

  • To comprehensively describe vision function in older individuals, moving beyond standard acuity measures.
  • To evaluate various psychophysical aspects of vision in an aging population.

Main Methods:

  • 900 individuals (ages 58-102) underwent binocular testing with habitual correction.
  • A battery of tests assessed high/low contrast acuity, glare, contrast sensitivity, color vision, stereoacuity, and attentional visual fields.

Main Results:

Related Experiment Videos

  • High contrast acuity remained stable on average, but spatial vision declined significantly under reduced contrast, luminance, or glare.
  • Many older adults showed impaired stereopsis, color discrimination, and peripheral vision under divided attention.
  • A single exponential function described age-related decline across spatial vision measures, with a time constant of ~15 years.

    • Conclusions:

    • Standard visual acuity fails to capture the full extent of vision loss in older adults under real-world conditions.
    • While the rate of decline is similar across spatial vision functions, the onset of decline varies by measure.