Purpose: To investigate the utilities of the imo^Ⓡ "binocular random single-eye test" (BRSET) in glaucoma practice
Subjects and methods: Among the glaucoma outpatients of the Kobe University Hospital, we included those aged ≥ 20 and <70 years and whose mean deviation (MD) of the eye with the greatest progression of visual field impairment on the Humphrey Filed Analyzer (HFA) 30-2 test was between -15 dB and -6 dB. The imo^Ⓡ 30-2 BRSET and the HFA 30-2 were measured on the same day, and the tests were repeated two months later. The number of the subjects who could perform BRSET was counted, and the testing time, mean sensitivity (MS), MD, pattern standard deviation (PSD), visual field index (VFI), and foveal threshold (FT) were compared. A questionnaire survey was conducted after the tests.
Results: Seven out of the 67 enrolled patients could not perform the BRSET. The BRSET test time was 25% shorter than the total HFA test time. The imo^Ⓡ MS and FT were significantly smaller than the HFA counterparts bilaterally, and the HFA MD was smaller than the imo^Ⓡ MD in the left eyes only. The PSD did not differ between the two tests. The HFA VFI was larger than the imo^Ⓡ VFI in the right eyes only. The MS, MD, PSD, and VFI all showed a high correlation between the two tests. The survey revealed that 89% of the patients preferred imo^Ⓡ over HFA.
Conclusions: Although the results of imo^Ⓡ BRSET and HFA strongly correlated with each other, a difference was observed in the results that could be attributed to their mechanical characteristics. While the imo^Ⓡ BRSET resulted in a shorter test time and greater patient satisfaction, it was not applicable in some individuals.
Nippon Ganka Gakkai Zasshi (J Jpn Ophthalmol Soc) 125: 530-538, 2021.