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Cristiano Umbelino, Adriana Morgan, Livia Mazzoli, Carla Urata, Alessandra Kusabara, Niro Kasahara; Expediency of the automated perimetry using the Goldmann V stimulus size in visually impaired glaucoma patients. Invest. Ophthalmol. Vis. Sci. 2018;59(9):5121.
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© ARVO (1962-2015); The Authors (2016-present)
White-on-white standard automated perimetry (AP) uses a white round stimulus with 0.43° diameter and 4 mm2 area (Goldmann size III). Patients with low vision have difficulty seeing such a small stimuli and are often tested with kinetic perimetry using the Goldmann size V stimulus with 1.7° diameter and 64 mm2 area. We undertook an observational case-control study to compare the performance of patients on AP using two different size stimuli.
Patients with glaucoma and visual acuity worse than 20/100 underwent AP using standard size III stimulus, SITA standard test and size V stimulus full threshold test, fastpac strategy. All patients were familiar with the procedure having done the test at least twice previously. Another group of glaucoma patients with visual acuity better than 20/60 served as controls. The main outcome measures included test duration, mean sensitivity, fixation loss (FL), false positive (FP), false negative (FN), and the patient subjective preference.
Patients demographics are depicted on table 1. FL, FP, and FN rates were lower with the size V stimulus as compared to SITA standard. MS was higher with size V stimulus test.
Size V stimulus full threshold test provides more reliable exams and higher mean sensitivity in glaucoma patients with low visual acuity. Patients seem to prefer size V than SITA standard strategy.
This is an abstract that was submitted for the 2018 ARVO Annual Meeting, held in Honolulu, Hawaii, April 29 - May 3, 2018.
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