Short-term fluctuation of blue-on-yellow perimetry in normal eyes

PURPOSE: To evaluate short term fluctuation (SF) of blue-on-yellow perimetry (B/Y) as compared with white-on-white perimetry (W/W) in normal eyes. SUBJECTS AND METHOD: One eye each of 25 healthy persons underwent B/Y and W/W perimetry repeated 5 times each. The test subjects had no previous experience of perimetry. An automated perimeter, Humphrey Field Analyzer, model 750, was used throughout. RESULTS: The SF at the first session of B/Y perimetry averaged 2.02 dB. This value was significantly different from those of the subsequent 4 sessions. Each of SF of B/Y perimetry at the first two sessions was significantly different from that of W/W perimetry at the first two sessions. The SF of B/Y perimetry showed wider fluctuations than those of W/W perimetry at each session. CONCLUSION: B/Y perimetry in normal eyes showed individual differences as well as fluctuations between the initial and consecutive sessions. This feature has to be considered in interpretation of the findings.