PROPERTIES OF HIGH-PASS RESOLUTION PERIMETRY TARGETS

Relationships between high-pass resolution perimetry ring targets and conventional perimetry and acuity targets were explored by optical ana lytical techniques and by comparative measurements in normal humans. H igh-pass resolution and acuity targets produced closely proportional r esolution measurements, showing that the critical ring detail is the w idth of the bright core. High-pass resolution and conventional perimet ry thresholds were not equally well correlated. From a purely optical point of view, high-pass resolution targets appeared to lose somewhat more contrast on defocusing. On the other hand, high-pass resolution a ppears to show less variability in practical, clinical use.