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Traumatically acquired color vision defect

R S Young, G A Fishman, F Chen

    Investigative Ophthalmology & Visual Science
    |May 1, 1980
    PubMed
    Summary
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    A head injury caused acquired color vision defect in a young man, affecting red/green discrimination and blue vision. This case highlights unique aspects of cortical trauma-induced visual disturbances.

    Area of Science:

    • Neuro-ophthalmology
    • Visual Neuroscience

    Background:

    • Acquired color vision defects can arise from various causes, including neurological trauma.
    • Understanding the specific visual pathways affected is crucial for diagnosis and management.

    Observation:

    • A 24-year-old male developed color vision impairment after a head injury.
    • Impaired color discrimination was noted in both eyes using the Farnsworth-Munsell 100-hue test.
    • Nagel anomaloscope testing indicated a red/green disturbance.

    Findings:

    • Increment threshold testing revealed an absent blue mechanism.
    • Foveal vision sensitivity measurements confirmed mediation by red or green mechanisms.
    • The patient presented with a unique combination of acquired color vision deficits.

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    Implications:

    • This case contributes to the understanding of acquired color vision defects following cortical trauma.
    • It underscores the complexity of visual pathway damage and its varied manifestations.
    • Further research into similar cases can refine diagnostic criteria and treatment strategies for visual field defects.