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[A study on retinal light sensitivity of normal human visual fields]
1Zhongshan Ophthalmic Center, Sun Yat-sen University of Medical Sciences, Guangzhou.
[Zhonghua Yan Ke Za Zhi] Chinese Journal of Ophthalmology
|September 1, 1994
Summary
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.
- 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.