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Comparison of Fastpak with full-threshold 24-2 glaucoma field tests
B Gillies1, M Rivers, A M Brooks
1Royal Victorian Eye and Ear Hospital, East Melbourne, Victoria, Australia.
Ophthalmic Surgery and Lasers
|September 1, 1996
Summary
The Fastpak strategy underestimates visual field mean deviation (MD) in glaucoma patients compared to full-threshold tests. This method showed greater variability and was not faster in advanced cases.
Area of Science:
- Ophthalmology
- Visual field testing
Background:
- Glaucoma diagnosis relies on visual field testing.
- The Fastpak strategy is a method for visual field assessment.
Purpose of the Study:
- To quantify the underestimation of mean deviation (MD) by the Fastpak strategy.
- To compare Fastpak with full-threshold visual field tests in glaucoma patients.
Main Methods:
- Sixty-seven eyes of 35 glaucoma patients were tested.
- Full-threshold 24-2 tests were performed before and after Fastpak.
- Some patients had repeat full-threshold tests to ensure data independence.
Main Results:
- Fastpak significantly underestimated MD compared to full-threshold tests.
- Testing time was similar for both methods.
- Pattern standard deviation (PSD) showed greater concordance than corrected pattern standard deviation (CPSD).
Conclusions:
- Fastpak is effective but shows greater variability than full-threshold tests.
- The underestimation of MD by Fastpak is not due to patient fatigue.
- Fastpak offers no speed advantage in advanced glaucoma; PSD is more consistent than CPSD.