The value of indices in the central and peripheral visual fields for the detection of glaucoma. 
We assessed 81 patients in four groups (normal, low- and high-risk ocular hypertension, and early glaucoma) with the standard Octopus G1 central visual field program in addition to two quantitative programs, PFN (peripheral field-nasal) and PFT (peripheral field-temporal), designed for this study to test the nasal and temporal periphery, respectively.  Indices were calculated for each program for each subject in all groups.  We then examined the behavior of the indices across the separate visual field areas within each group as well as the behavior of the indices of each field area among the different groups.  We found that quantitative testing of the peripheral nasal visual field provided valuable information in the detection of glaucomatous visual dysfunction additional to that provided by quantitative testing of the central visual field.  Quantitative testing of the temporal periphery was less valuable.