Evaluation of baseline-related suprathreshold testing for quick determination of visual field nonprogression.
OBJECTIVE
To evaluate a commercially available means of baseline-related suprathreshold examination designed to detect visual field worsening.


METHODS
Patients for whom results of a baseline series of static-threshold visual field examinations were available underwent both a second static-threshold examination (full-threshold strategy; average time, 15 minutes) and a baseline-related suprathreshold examination ("fast-threshold" strategy; average time, 5 minutes).


RESULTS
Most of the 1702 points examined were apparently unchanged from baseline, showing with either method only the degree of variation expected from the measurement inconsistency (short-term fluctuation). For points that did show a change, the changes shown by the two methods were correlated. Change in the field as a whole, represented by a cluster of locations showing deterioration, was evident more frequently with the standard testing strategy: 11 of 37 field examinations showed deterioration by both methods and an additional 11 examinations showed deterioration by the full-threshold method only.


CONCLUSIONS
Each examination method identified pointwise changes not detected by the other, the combined effect of false-positive errors (imperfect specificity) and false-negative errors (imperfect sensitivity) with each of the two methods. The findings relating to clusters could represent a better sensitivity of the full-threshold method in detecting visual field deterioration, a better specificity of the suprathreshold method, or both.
Araujo
M L
ML
Bascom Palmer Eye Institute, Miami, FL 33101-6880.
Feuer
W J
WJ
Anderson
D R
DR
D005069:Evaluation Studies as Topic; D005189:False Positive Reactions; D005500:Follow-Up Studies; D005901:Glaucoma / Q000175:diagnosis; D006801:Humans; D012680:Sensitivity and Specificity; D012684:Sensory Thresholds; D014786:Vision Disorders / Q000175:diagnosis* / Q000503:physiopathology; D058609:Visual Field Tests / Q000379:methods*; D014794:Visual Fields