title: Association of reliability with reproducibility of the glaucomatous visual field.
abstract: We studied 207 glaucoma patients (207 eyes) who had two successive visual tests on the Humphrey Field Analyzer to determine the association of unreliability (> 10% incidence of a missed catch trial test) with threshold variation. We found that in patients where one visual field showed > 30% false negative or positive errors, and the other visual field also was unreliable, a significant increase in the variance of the mean defect existed from reliable patients (p < 0.05). Of patients who had only one of two visual fields which was unreliable (from false negative errors), only those with marked glaucomatous visual field loss (< -15 dB depth of defect) showed a greater variance in mean defect between examinations over reliable patients (p < 0.05). In total, 41 patients (19.8%) had unreliable visual fields associated with statistically increased threshold variation. This study suggests that patient reliability should be considered when interpreting changes in threshold between automated visual field examinations.
authors: Department of Ophthalmology, Medical University of South Carolina, Charleston.
authors: T A
authors: TA
authors: McMillan
authors: W C
authors: WC
authors: Stewart
authors: H H
authors: HH
authors: Hunt
mesh_terms: D000368:Aged; D005188:False Negative Reactions; D005403:Fixation, Ocular; D005901:Glaucoma / Q000175:diagnosis / Q000503:physiopathology*; D006801:Humans; D007429:Intraocular Pressure; D008875:Middle Aged; D009798:Ocular Hypertension / Q000175:diagnosis / Q000503:physiopathology*; D011237:Predictive Value of Tests; D015203:Reproducibility of Results; D014786:Vision Disorders / Q000175:diagnosis; D058609:Visual Field Tests / Q000379:methods*; D014794:Visual Fields