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[A study on retinal light sensitivity of normal human visual fields]

M B Yu1, W B Zhou, T C Ye

  • 1Zhongshan Ophthalmic Center, Sun Yat-sen University of Medical Sciences, Guangzhou.

[Zhonghua Yan Ke Za Zhi] Chinese Journal of Ophthalmology
|September 1, 1994
PubMed
Summary
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Automated perimetry using QZS-2 revealed that retinal light sensitivity declines with age and visual field eccentricity in normal subjects. No significant differences were found between sexes or eyes.

Area of Science:

  • Ophthalmology
  • Visual Science
  • Medical Technology

Context:

  • Automated perimetry is crucial for assessing visual function.
  • Understanding normal visual field parameters is essential for diagnosing visual impairments.
  • The QZS-2 automated perimeter is a tool developed in China for visual field testing.

Purpose:

  • To establish normative data for retinal light sensitivity using the QZS-2 automated perimeter.
  • To investigate the influence of age, eccentricity, sex, and eye laterality on visual field sensitivity.
  • To analyze the relationship between age, eccentricity, and light sensitivity in normal individuals.

Summary:

  • Retinal light sensitivity was measured in 111 eyes of 59 normal individuals using the QZS-2 automated perimeter, covering central and peripheral visual fields.

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  • Results showed no significant differences in light sensitivity between the left and right eyes or between male and female subjects.
  • Mean light sensitivity demonstrated a linear decline with increasing age and eccentricity, decreasing by 0.6-0.7 dB per decade of age and 2.6 dB per 10 degrees of eccentricity.

    • Impact:

    • Provides normative data for the QZS-2 automated perimeter, aiding in the diagnosis of visual field defects.
    • Highlights the significant impact of aging and eccentricity on retinal light sensitivity.
    • Contributes to a better understanding of normal visual field characteristics, crucial for clinical practice and research.