Related Experiment Videos
Use of pattern standard deviation instead of corrected pattern standard deviation in Anderson's criteria
1Department of Ophthalmology, Chirstian Medical College, Vellore, India.
Journal of Glaucoma
|December 29, 2000
Summary
Using pattern standard deviation (PSD) instead of corrected pattern standard deviation (CPSD) in Anderson's criteria for Humphrey Field Analyzer printouts shows high agreement. This substitution is valid for categorizing glaucomatous field defects.
Area of Science:
- Ophthalmology
- Visual electrophysiology
- Glaucoma diagnostics
Background:
- Anderson's criteria are used to classify visual field defects.
- Corrected pattern standard deviation (CPSD) is a key component of these criteria.
- Evaluating alternative metrics like pattern standard deviation (PSD) is crucial for diagnostic accuracy.
Purpose of the Study:
- To assess if substituting pattern standard deviation (PSD) for corrected pattern standard deviation (CPSD) impacts the categorization of visual fields using Anderson's criteria.
- To determine the agreement between CPSD and PSD in classifying glaucomatous field defects on the Humphrey Field Analyzer.
Main Methods:
- Full threshold perimetry was performed on 48 patients with varying glaucomatous field defects.
- Visual fields were categorized using Anderson's criteria, first with CPSD and then with PSD.
- The kappa statistic was employed to quantify agreement in both categorization methods.
Main Results:
- The agreement between CPSD and PSD alone was substantial (kappa = 0.77).
- Categorization using Anderson's criteria showed high agreement when using PSD instead of CPSD (kappa = 0.82, weighted kappa = 0.92).
Conclusions:
- There is almost perfect agreement when using PSD in place of CPSD within Anderson's criteria.
- This substitution appears valid for classifying the range of glaucomatous field defects studied, particularly with full threshold programs.