Twenty-six eyes of 26 patients with glaucoma (mean [SD] age, 60.5 [12.7] years) were included in this study. Each patient received a complete ophthalmic examination including medical history review, best-corrected visual acuity, slitlamp biomicroscope, intraocular pressure measurement with Goldmann applanation tonometry, dilated funduscopic examination, gonioscopy, and SAP with the Humphrey Field Analyzer II (Carl Zeiss Meditec Inc, Dublin, California) using the 24-2 program and the Swedish Interactive Threshold Algorithm. Inclusion criteria for these patients included best-corrected visual acuity of 20/60 or better, spherical refraction within ±6.00 diopters (D), cylinder correction within ±2.00 D, and open angle on gonioscopy. In addition, all eyes had glaucomatous damage, as indicated by glaucomatous optic neuropathy and an abnormal 24-2 visual field (abnormal glaucoma hemifield test and/or abnormal mean deviation [MD]). Glaucomatous optic neuropathy was defined as a vertical cup to disc ratio greater than 0.6, asymmetry of the cup to disc ratio 0.2 or greater between eyes, presence of localized RNFL, or neuroretinal rim defects or a splinter hemorrhage in the absence of any other abnormalities that could explain such findings. Patients with clinically significant cataracts, other media opacities, or other ocular diseases were excluded. For 23 of the 26 patients, the eye chosen for analysis had the worse MD value. In one case, the eye with the worse MD had an unreliable field; in a second case, the eye had a poor OCT scan; and in the third case, the 2 eyes had nearly identical MDs, so the one with the poorer central sensitivity was chosen. The patients were placed into 2 groups based on their sensitivity to the foveal test point in the 24-2 visual field. Seventeen patients had a foveal sensitivity within normal limits and comprised the high-sensitivity group. The other 9 patients, the low-sensitivity group, had abnormal foveal sensitivity. The average foveal sensitivities were 35.9 dB (range, 33-39 dB) and 27.9 dB (range, 23-32 dB) for the high- and low-sensitivity groups, respectively. The average of the MD for the 24-2 visual field was −7.0 dB (range, −0.7 to −25.4 dB) and −13.3 dB (range, −3.6 to −26.6 dB) for the high- and low-sensitivity groups, respectively. Eyes with retinal disease, nonglaucomatous optic neuropathy, or uveitis were excluded from this study.