Comparison of the Humphrey Field Analyser and Humphrey Matrix Perimeter for the evaluation of glaucoma patients.
OBJECTIVE
To compare the Humphrey Matrix Perimeter (HMP) with the Humphrey Field Analyser (HFA) in visual-field examinations of patients with glaucoma or suspected glaucoma.


METHODS
One hundred and forty-nine patients with suspected glaucoma or glaucoma were recruited. All patients underwent visual-field examinations with the Swedish Interactive Threshold Algorithm standard, the central 30-2 threshold test with the HFA, and the frequency doubling technique 30-2 threshold test with the HMP. The examination times, mean deviations (MDs) and pattern standard deviations (PSDs) of both perimeters were compared in all patients and according to the patient's diagnosis or the severity of their visual-field defects (VFDs). The paired 2-tailed t test and Pearson's correlation coefficients were used for statistical analyses.


RESULTS
Overall, the examination times were significantly shorter with the HMP than with the HFA. There was a positive correlation between the HFA and HMP measurements of MD and PSD. In patients with suspected glaucoma, the PSDs measured with the HMP were significantly higher than those measured with the HFA. In patients with mild VFDs (MD >-4.0 dB), PSDs measured with the HMP were significantly higher than those measured with the HFA. In patients with severe VFDs (MD <-12.0 dB), MDs measured with the HMP were significantly higher than those measured with the HFA, whereas PSDs measured with the HMP were significantly lower than those measured with the HFA.


CONCLUSIONS
The HMP is more time efficient than the HFA in visual-field examinations. The HMP tends to overestimate mild VFDs and underestimate severe VFDs.
Chen
Yi-Hao
YH
Department of Ophthalmology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROC.
Wu
Jian-Nan
JN
Chen
Jiann-Torng
JT
Lu
Da-Wen
DW
D000328:Adult; D004867:Equipment Design; D005260:Female; D005901:Glaucoma / Q000150:complications / Q000175:diagnosis* / Q000503:physiopathology; D006801:Humans; D008297:Male; D015203:Reproducibility of Results; D012189:Retrospective Studies; D012607:Scotoma / Q000175:diagnosis / Q000209:etiology; D058609:Visual Field Tests / Q000295:instrumentation*; D014794:Visual Fields