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Related Experiment Videos

Isolating the color vision loss in primary open-angle glaucoma.

P A Sample1, R M Boynton, R N Weinreb

  • 1Department of Ophthalmology, University of California, San Diego, La Jolla.

American Journal of Ophthalmology
|December 15, 1988
PubMed
Summary

Glaucoma patients show impaired color vision, not solely due to aging or lens changes. This study confirms disease-related color vision loss in primary open-angle glaucoma.

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Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Color vision is crucial for daily activities.
  • Glaucoma, a progressive optic neuropathy, can affect visual function.
  • Previous studies suggested age and lens density might influence color vision in glaucoma, but this was not definitively established.

Purpose of the Study:

  • To investigate the relationship between color vision, age, and lens density in normal subjects and glaucoma patients.
  • To determine if glaucoma itself contributes to color vision deficits beyond age-related and lens-related changes.

Main Methods:

  • Farnsworth-Munsell 100-Hue test was administered to normal subjects, glaucoma suspects, and patients with primary open-angle glaucoma.
  • Participants were matched for age and lens density to control for these variables.

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  • Error scores on the color vision test were analyzed.

    • Main Results:

    • No significant correlation was found between Farnsworth-Munsell 100-Hue test results and age or lens density in any group.
    • A significant difference in total error scores was observed between the groups, indicating impaired color vision in glaucoma patients.
    • This color vision deficit could not be attributed to pupil size or medications.

    Conclusions:

    • Color vision loss in primary open-angle glaucoma is partly due to the disease process itself.
    • Age and lens density do not solely explain the observed color vision deficits in glaucoma.
    • The findings highlight the impact of glaucoma on the visual system beyond intraocular pressure and optic nerve damage.