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Related Experiment Videos

Peripheral nasal field defects in glaucoma.

E B Werner, J Beraskow

    Ophthalmology
    |October 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

    The nasal step in glaucoma is an early sign of nerve fiber bundle defects, often presenting as a peripheral scotoma. This finding suggests a distinct mechanism compared to simple nasal isopter depression in glaucoma patients.

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    Area of Science:

    • Ophthalmology
    • Glaucoma Research
    • Visual Field Analysis

    Background:

    • Chronic open-angle and low tension glaucoma are characterized by progressive visual field loss.
    • Typical visual field changes in glaucoma include various patterns of visual field defects.

    Purpose of the Study:

    • To investigate the nature of the peripheral nasal step visual field defect in glaucoma.
    • To determine if the nasal step represents an early nerve fiber bundle defect.

    Main Methods:

    • Analysis of visual field changes in 151 eyes of 101 glaucoma patients.
    • Identification and characterization of nasal step defects and associated peripheral scotomas.

    Main Results:

    • A nasal step visual field defect was observed in 60 eyes.

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  • In 17 of these eyes, an isolated scotoma in the nasal periphery was identified.
  • The nasal step defect was found to be associated with nerve fiber bundle defects.

    • Conclusions:

    • The peripheral nasal step in glaucoma is indicative of a nerve fiber bundle defect.
    • This defect may manifest as an early-stage scotoma in the nasal periphery.
    • The nasal step behaves similarly to central visual field defects, not just nasal isopter depression.