Threshold variability using different Goldmann stimulus sizes.
We tested 10 healthy subjects on the Humphrey Field Analyzer using Goldmann stimulus sizes I-V to determine the effect of varying the area of the stimulus upon threshold fluctuation. Our results show similar components of fluctuation for the size III stimulus as in past studies. However, an increased total fluctuation was observed for Goldmann stimulus sizes I (3.69 decibels) and II (3.17 decibels) and a similar fluctuation for stimulus sizes IV (2.64 decibels) and V (2.51 decibels) as compared to stimulus size III (2.52 decibels). The study suggests no advantage results in reduced threshold fluctuation by changing the Goldmann stimulus from a size III when testing normal individuals on the Humphrey Field Analyzer.
Gilpin
L B
LB
Department of Ophthalmology, Medical University of South Carolina, Charleston.
Stewart
W C
WC
Hunt
H H
HH
Broom
C D
CD
D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D012684:Sensory Thresholds; D014787:Vision Tests / Q000379:methods*; D058609:Visual Field Tests; D014794:Visual Fields