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Related Experiment Videos

Optic disk size in chronic glaucoma: the Beijing eye study.

Jost B Jonas1, Liang Xu, Li Zhang

  • 1Department of Ophthalmology, Faculty of Clinical Medicine Mannheim, University of Heidelberg, Mannheim, Germany. Jost.Jonas@augen.ma.uni-heidelberg.de

American Journal of Ophthalmology
|July 4, 2006
PubMed
Summary

Optic disk size in adult Chinese individuals does not significantly differ between normal eyes and those with chronic glaucoma. This finding suggests optic disk size is not a primary indicator for glaucoma in this population.

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Area of Science:

  • Ophthalmology
  • Glaucoma Research
  • Optic Nerve Head Morphology

Background:

  • Glaucoma is a leading cause of irreversible blindness worldwide.
  • Optic disk size is a potential factor influencing glaucoma development and progression.
  • Understanding optic disk morphology in different populations is crucial for early diagnosis.

Purpose of the Study:

  • To investigate if chronic glaucoma is associated with larger or smaller optic disks compared to normal eyes.
  • To analyze optic disk area in relation to glaucoma status and intraocular pressure in an adult Chinese cohort.

Main Methods:

  • A population-based, cross-sectional cohort study was conducted.
  • 4439 subjects aged 40 years and above were included, with morphometric examination of optic disk photographs.

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  • Statistical analysis was performed on 3989 subjects after exclusions.

    • Main Results:

    • The mean optic disk area showed no significant difference (P > .05) across groups: nonglaucomatous, glaucomatous appearance, glaucomatous optic disks with visual field defects, and elevated intraocular pressure.
    • Specific mean areas were: 2.61 ± 0.50 mm² (normal), 2.69 ± 0.63 mm² (glaucomatous appearance), 2.66 ± 0.70 mm² (glaucoma + VF defects), and 2.63 ± 0.49 mm² (high IOP).

    Conclusions:

    • Optic disk size does not appear to markedly differ between normal and chronic glaucoma eyes in adult Chinese.
    • These findings suggest optic disk size alone may not be a reliable distinguishing feature for chronic glaucoma in this demographic.