Twenty-one control participants (age range, 61–79 years) and 20 people with glaucoma (age range, 59–84 years) were recruited. There was no significant difference (independent t-test, t39 = 1.81, P = 0.078) in the mean age between the groups (control, mean [± standard deviation {SD}] age = 69 ± 5.58 years; glaucoma, mean [± SD] age = 72.5 ± 6.45 years). All participants underwent a complete ocular examination to ensure study eligibility, including visual acuity measurement (Early Treatment Diabetic Retinopathy Study chart), slit lamp biomicroscopy, and ophthalmoscopy. In addition to the complete ocular examination, all participants underwent optic nerve head and macula assessment using the Heidelberg Spectralis with the Glaucoma Module (Heidelberg Engineering GmBH, Heidelberg, Germany) and central visual field assessment using a Humphrey Field Analyzer (HFA 10-2 SITA Standard; Carl Zeiss Meditec, Dublin, CA, USA). All 41 participants were required to meet the following inclusion criteria: best-corrected visual acuity better than or equal to 6/9.6 Snellen acuity (0.20 log MAR equivalent), distance refractive error within ± 5.00 D sphere or less than −2.00 D cylinder, and normal ocular health. Participants with glaucoma were required to have a clinical diagnosis of glaucoma with established visual field defects using the 24-2 test pattern assessed using SITA Standard (HFA). The optical coherence tomography (OCT) data were not used for inclusion purposes for the glaucoma group; however, control participants were required to have macular scans that were deemed normal by visual inspection using the Spectralis OCT (Heidelberg Engineering, GmBH, Heidelberg, Germany). Participants taking any medication known to affect contrast sensitivity or eye movements were excluded from the study. The study was approved by the Human Research Ethics Committee of the University of Melbourne (HREC Ethics ID 1750215.3). Written informed consent was obtained from the participants before the experiment, and all study protocols were in accordance with the tenets of the Declaration of Helsinki.