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Comparative Study
. 2011 May;88(5):635-9.
doi: 10.1097/OPX.0b013e318211aa92.

Variability of rarebit and standard perimetry sizes I and III in normals

Jesse M Vislisel  1 , Carrie K Doyle, Chris A Johnson, Michael Wall
Affiliations
Comparative Study

Variability of rarebit and standard perimetry sizes I and III in normals

Jesse M Vislisel et al. Optom Vis Sci. 2011 May.

Abstract

Purpose: To compare test-retest variability in rarebit perimetry (RBP) and conventional standard automated perimetry (SAP) using Goldmann size I and III stimuli.

Methods: Seventeen normal subjects underwent RBP, size I SAP, and size III SAP on five separate visits within a 5-week period. Test-retest variability could not be directly compared because of differences in units. Instead, data were transformed to lie on the same scale by calculating a percentile range to mean ratio for each test.

Results: Percentile range to mean ratio was highest for size I (3.42 ± 0.62), followed by size III (2.29 ± 0.55), and RBP (0.29 ± 0.10). Results for all three tests were significantly different from each other.

Conclusions: Comparison of tests with different scales is problematic, but RBP's retest variability appears to be significantly less than both sizes I and III SAP in the measurement of normal subjects.

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