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Related Experiment Videos

Nerve fiber analysis and optic disc parameters with the glaucoma-scope

Y Lachkar1, H Cohn

  • 1Glaucoma Institute, Saint-Joseph Hospital, Paris, France.

International Ophthalmology
|January 1, 1996
PubMed
Summary

Glaucoma-scope optic disc parameters and nerve fiber analysis effectively distinguish glaucoma from normal or hypertensive eyes. The mean photopic/depth (MP/D) index showed significant differences across all groups, aiding glaucoma diagnosis.

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Area of Science:

  • Ophthalmology
  • Medical Imaging

Background:

  • Glaucoma diagnosis relies on detecting optic nerve damage.
  • Accurate measurement of optic disc parameters and nerve fiber layers is crucial for early detection.

Purpose of the Study:

  • To assess the efficacy of the Glaucoma-scope in differentiating glaucoma from normal and ocular hypertensive eyes.
  • To evaluate optic disc parameters and nerve fiber analysis for glaucoma detection.

Main Methods:

  • Glaucoma-scope examinations were conducted on 68 eyes across four groups: normal, ocular hypertension, early glaucoma, and moderately advanced glaucoma.
  • Juxtapapillary nerve fiber layer contours were measured.
  • A global index, mean disc depth corrected for disc area (MP/D), was calculated.

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Main Results:

  • A statistically significant difference (p < 0.001) in the MP/D index was observed between all four groups.
  • Normal eyes had an MP/D of -17.42, hypertensive eyes -26.34, early glaucoma -82.33, and moderately advanced glaucoma -99.69.
  • Significant differences in superior and inferior quadrant nerve fiber layer height were found between normal/hypertensive and glaucoma groups.

Conclusions:

  • Nerve fiber analysis using the Glaucoma-scope is a valuable tool for glaucoma diagnosis.
  • The optic nerve head index calculated by the Glaucoma-scope aids in glaucoma diagnosis and patient follow-up.