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Related Experiment Videos

Pseudoglaucomatous physiologic large cups.

J B Jonas1, F M Zäch, G C Gusek

  • 1Department of Ophthalmology, University Erlangen-Nürnberg, West Germany.

American Journal of Ophthalmology
|February 15, 1989
PubMed
Summary
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Large optic cups in subjects with glaucoma share distinct morphologic characteristics, including larger disk area and horizontal cup-to-disk ratios. These features aid in differentiating primary versus secondary large optic cups.

Area of Science:

  • Ophthalmology
  • Optometry
  • Glaucoma Research

Background:

  • Optic disc morphology is crucial for diagnosing glaucoma.
  • Large optic cups can be challenging to differentiate between primary and secondary causes.
  • Understanding morphologic characteristics aids in accurate diagnosis and management.

Purpose of the Study:

  • To investigate the specific morphologic characteristics of large optic cups in subjects with glaucoma.
  • To compare these characteristics with normal optic disks and glaucomatous eyes.
  • To identify features that differentiate primary from secondary large optic cups.

Main Methods:

  • Planimetric analysis of stereoscopic optic disk photographs.
  • Studied 21 optic nerve heads with large optic cups ( > mean + 2 S.D.).

Related Experiment Videos

  • Compared findings with 571 normal optic disks and 706 glaucomatous eyes.

    • Main Results:

    • Abnormally large optic disk area (4.49 +/- 0.56 mm2).
    • Significantly larger horizontal cup/disk ratios (0.78 +/- 0.03) than vertical (0.71 +/- 0.03).
    • Normal neuroretinal rim area and configuration, with inferior rim broader than superior.

    Conclusions:

    • Subjects with large optic cups and glaucoma exhibit specific morphologic traits.
    • These traits include larger optic disk area and distinct cup-to-disk ratios.
    • These findings assist in differentiating primary and secondary large optic cups.