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Related Experiment Videos

Statpac 2 glaucoma change probability.

R K Morgan¹, W J Feuer, D R Anderson

¹Bascom Palmer Eye Institute, Department of Ophthalmology, University of Miami, School of Medicine, FL 33101.

Archives of Ophthalmology (Chicago, Ill. : 1960)

|December 1, 1991

Summary

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The Humphrey Field Analyzer

Area of Science:

Ophthalmology
Visual field testing

Background:

Assessing visual field deterioration is crucial for managing glaucoma.
Traditional methods rely on fixed criteria, which may not capture subtle changes.

Purpose of the Study:

To compare the effectiveness of a fixed criterion versus a variable criterion (Statpac 2) for detecting visual deterioration.
To evaluate agreement between these methods in identifying stable and deteriorating points in visual fields.

Main Methods:

Analysis of 123 follow-up visual fields from 17 patients.
Comparison of a fixed 5 dB criterion with the Humphrey Field Analyzer's Statpac 2 algorithm.
Statistical analysis using kappa values to assess agreement between methods.

Main Results:

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Overall agreement between the fixed and Statpac 2 criteria was reasonable (kappa = 0.55).
Central visual field points showed stronger agreement (kappa = 0.68) compared to edge points.
The fixed criterion tended to overestimate progression at peripheral points.

Conclusions:

The Statpac 2 criterion offers a more automated and potentially accurate approach to identifying visual field changes.
Variable criteria may provide a more nuanced assessment of visual deterioration, especially in central fields.
Automated analysis simplifies interpretation and may improve diagnostic accuracy in glaucoma management.