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Differences in visual function and optic nerve structure between healthy eyes of blacks and whites
Lyne Racette1, Catherine Boden, Shannon L Kleinhandler
1Hamilton Glaucoma Center and Visual Function Laboratory, Department of Ophthalmology, University of California at San Diego, La Jolla 92093-0946, USA.
Archives of Ophthalmology (Chicago, Ill. : 1960)
|November 16, 2005
Summary
Racial differences in visual function were minimal, but optic disc topography and retinal nerve fiber layer (RNFL) thickness varied significantly between Black and White individuals. Further research is needed to understand these disparities.
Area of Science:
- Ophthalmology
- Optometry
- Racial Health Disparities
Background:
- Understanding racial variations in ocular structures and visual function is crucial for accurate diagnosis and management of eye diseases.
- Previous studies have suggested potential differences, but comprehensive investigations comparing multiple visual function tests and imaging modalities are limited.
Purpose of the Study:
- To investigate racial differences in visual function, optic disc topography, and retinal nerve fiber layer (RNFL) thickness between healthy Black and White individuals.
- To compare results from standard automated perimetry, short-wavelength automated perimetry, and frequency doubling technology perimetry, alongside Heidelberg Retina Tomograph and optical coherence tomography measurements.
Main Methods:
- Recruited 50 healthy Black and 50 healthy White participants.
- Assessed visual function using standard automated perimetry, short-wavelength automated perimetry, and frequency doubling technology perimetry.
- Measured optic disc topography and RNFL thickness using Heidelberg Retina Tomograph and optical coherence tomography.
Main Results:
- Black individuals exhibited poorer visual field results on frequency doubling technology perimetry compared to White individuals.
- Black individuals had larger optic disc areas and thicker superior and inferior RNFL measurements.
- Slightly higher intraocular pressures and thinner central corneas were noted in Black individuals.
Conclusions:
- Race significantly impacts optic disc topography and RNFL thickness in healthy eyes, despite minimal differences in overall visual function.
- Observed racial differences in intraocular pressure may be influenced by central corneal thickness.
- Further prospective studies are warranted to elucidate the clinical significance of these racial variations.
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