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Sensitivity and specificity of optic disc parameters in chronic glaucoma
1Department of Ophthalmology, University of Hamburg, Germany.
Investigative Ophthalmology & Visual Science
|June 1, 1993
Summary
The vertical cup-to-disc ratio is best for initial glaucoma screening, while neuroretinal rim area is more valuable for ongoing patient monitoring and evaluation of glaucomatous optic disc changes.
Area of Science:
- Ophthalmology
- Medical Imaging
Background:
- Optic disc parameters are crucial for diagnosing glaucoma.
- Receiver operating characteristic (ROC) curves are used to assess diagnostic tests.
Purpose of the Study:
- To evaluate the effectiveness of different optic disc parameters in detecting glaucomatous optic discs using ROC curves.
- To compare the diagnostic utility of vertical cup/disc ratio, neuroretinal rim area, and cup volume.
Main Methods:
- Computer perimetry and computerized optic disc topometry were performed on 93 eyes of 53 subjects with glaucoma.
- Optic disc parameters were correlated with visual field indexes.
- ROC curves were calculated to assess the separation characteristics of different parameters.
Main Results:
- The vertical cup/disc ratio demonstrated the best separation of glaucomatous from normal eyes.
- Neuroretinal rim area showed a stronger correlation with visual field indexes compared to the vertical cup/disc ratio.
- Cup volume was not effective in separating glaucomatous from normal eyes or correlating with visual field indexes.
Conclusions:
- The vertical cup-to-disc ratio is most suitable for initial screening of glaucoma.
- Neuroretinal rim area is more valuable for follow-up evaluations and monitoring disease progression.